Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
Minoru Nishida Last modified date:2019.06.28

Professor / Materials Physics and Engineering, Crystal Physics and Engineering
Department of Advanced Materials Science and Engineering
Faculty of Engineering Sciences


Graduate School
Undergraduate School
Other Organization
Administration Post
Other
Other
Other
Other
Other


E-Mail
Homepage
http://www.asem.kyushu-u.ac.jp/of/of01/
Phone
092-583-7534
Fax
092-583-7534
Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
No
Field of Specialization
Microstructure of Materials
Total Priod of education and research career in the foreign country
02years00months
Outline Activities
The nanostructure analysis in advanced materials such as shape memory alloys, hydrogen permeation alloys is mainly performed by various electron microscopy techniques. The obtained results are fed back to the structure control in those materials. The basic researches on the phase transformation in metals and alloys are also performed.
Research
Research Interests
  • Imaging of phase transformation in crystalline materials with scanning electron microscopy (SEM)
    keyword : SEM, Magnetic Domain Structure
    2015.04.
  • nano-structure analysis and practical application of Ti alloys
    keyword : Ti alloys, Transmission electron microscopy, omega transformation
    1983.12.
  • nano-structure analysis and practical application of shape memory alloys
    keyword : shape memory and superelastic alloy, ferromagnetic shapr memory alloy, martensitic transformation
    1983.12.
Academic Activities
Reports
1. Microstructure of isothermal ω-phase in β-Ti alloys.
Papers
1. Hiroshi Akamine, So Okumura, Sahar Farjami, Yasukazu Murakami, Minoru Nishida, Imaging of surface spin textures on bulk crystals by scanning electron microscopy, Scientific reports, 10.1038/srep37265, 6, 2016.11, Direct observation of magnetic microstructures is vital for advancing spintronics and other technologies. Here we report a method for imaging surface domain structures on bulk samples by scanning electron microscopy (SEM). Complex magnetic domains, referred to as the maze state in CoPt/FePt alloys, were observed at a spatial resolution of less than 100 nm by using an in-lens annular detector. The method allows for imaging almost all the domain walls in the mazy structure, whereas the visualisation of the domain walls with the classical SEM method was limited. Our method provides a simple way to analyse surface domain structures in the bulk state that can be used in combination with SEM functions such as orientation or composition analysis. Thus, the method extends applications of SEM-based magnetic imaging, and is promising for resolving various problems at the forefront of fields including physics, magnetics, materials science, engineering, and chemistry..
2. Y. Soejima, S. Motomura, Masatoshi Mitsuhara, T. Inamura, Minoru Nishida, In situ scanning electron microscopy study of the thermoelastic martensitic transformation in Ti-Ni shape memory alloy, Acta Materialia, 10.1016/j.actamat.2015.10.017, 103, 352-360, 2016.01, The thermoelastic martensitic transformation from the B2 to B19′ structures in the Ti-Ni shape memory alloy was observed by in situ scanning electron microscopy in order to investigate the self-accommodation microstructure. Nucleation of the V-shaped habit plane variant cluster (2HPVC) triggers the formation of the hexangular HPVC (6HPVC) that is formed by six habit plane variants in the grain interior. The triangular morphology (3HPVC) is a derivative of 2HPVC. The autocatalytic transformation spreads from the 6HPVCs to the grain boundary and the reverse transformation proceeds like a rewind of the forward transformation. 2HPVC and 6HPVC are the most favorable morphologies for nucleation and growth, respectively, as explained by the analysis of the kinematic compatibility at junction planes..
3. B. Karbakhsh Ravari, S. Farjami, Minoru Nishida, Effects of Ni concentration and aging conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys, Acta Materialia, 10.1016/j.actamat.2014.01.028, 69, 17-29, 2014.05, The effects of Ni concentration and aging conditions on the multistage martensitic transformation (MMT) in aged Ni-rich Ti-Ni alloys have been investigated by differential scanning calorimetry and in situ scanning electron microscopy. The effect of Ni concentration was evaluated using Ti-50.6, 50.8 and 51.0 at.% Ni alloys. These alloys were heat treated at 1223 K for 3.6 ks and then aged at 773 K for 3.6 ks. Although the triple-stage transformation appeared in the Ti-50.6 and 51 at.% Ni alloys during cooling, the transformation sequence of the two alloys was completely different. Quadruple-stage transformation was observed in the Ti-50.8 at.% Ni alloy. The characteristic microstructure responsible for the MMT in each of the aged alloys strongly depended on the degree of Ni supersaturation and the aging temperature and time. We have proposed and experimentally verified a general rule that explains the effects of Ni concentration and aging conditions on the microstructural changes and thus the MMT sequences. This will allow the MMT in Ni-rich Ti-Ni alloys to be controlled by selecting appropriate aging conditions..
4. B. Karbakhsh Ravari, Minoru Nishida, In situ SEM studies of the transformation sequence of multistage martensitic transformations in aged Ti-50.8 at.% Ni alloys, Philosophical Magazine, 10.1080/14786435.2013.769070, 93, 18, 2279-2296, 2013.06, The transformation behaviour of the multistage martensitic transformation in aged Ti-50.8 at.% Ni alloys was investigated by differential scanning calorimetry (DSC) and in situ scanning electron microscopy (SEM). The specimens aged from 673 to 748 K for 3.6 ks under an unregulated heat treatment atmosphere exhibited the double-stage transformation during cooling. The quadruple-stage transformation was observed in the specimens aged at 773 and 798 K, and the triple-stage transformation appeared in the specimen aged at 823 K under an unregulated heat treatment atmosphere. The distribution and size of Ti 3Ni4 precipitates were heterogeneous in these specimens. The single-stage transformation in the specimen aged at 848 K was similar to that of the solution-treated specimen. In the forward quadruple-stage transformation, the R-phase transformation occurred in the intermediate region and around the grain boundary. The first martensitic transformation, which corresponded to the M1 peak in the DSC cooling curve, took place in the intermediate region of grains via the R phase. The second transformation, which corresponded to the M2 peak, occurred around the grain boundary via the R phase. The final transformation, which corresponded to the M3 peak, arose directly from the B2 parent phase at the grain centre. The transformation sequence and areas described above were quantitatively verified by comparing the SEM observations with the DSC measurements. The transformation sequence of the triple-stage transformation was also discussed..
5. Minoru Nishida, E. Okunishi, T. Nishiura, H. Kawano, T. Inamura, S. Ii, T. Hara, Self-accommodation of B19 martensite in Ti-Ni shape memory alloys-Part II. Characteristic interface structures between habit plane variants, Philosophical Magazine, 10.1080/14786435.2012.669860, 92, 17, 2234-2246, 2012.06, Four characteristic interface microstructures between habit plane variants (HPVs) in the self-accommodation morphologies of B19 martensite in Ti-Ni alloys have been investigated by scanning transmission electron microscopy (STEM). The straight interface of a B 19′ type I twin is present at interface I. The relaxation of the transformation strain at interface II is achieved by a volume reduction of the minor correspondence variants (CVs) in the relevant habit plane variants (HPVs). The relaxation of the transformation strain at interface III is mainly due to the formation of a B 19′ type I twin between the two major CVs. Subsequently, local strain around the tips of the minor CVs perpendicular to the interface is released by the formation of micro-twins with the 011B 19′ type II and/or B 19′ type I relation. The major and minor CVs in each HPV are alternately connected through fine variants with the B 19′ type I twin relation parallel to interface IV. The results are compared with macroscopic observations and the predictions of PTMC analysis..
6. Minoru Nishida, T. Nishiura, H. Kawano, T. Inamura, Self-accommodation of B19′ martensite in Ti-Ni shape memory alloys-Part I. Morphological and crystallographic studies of the variant selection rule, Philosophical Magazine, 10.1080/14786435.2012.669858, 92, 17, 2215-2233, 2012.06, The self-accommodation morphologies of B19 martensite in Ti-Ni alloys have been investigated by optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Twelve pairs of minimum units consisting of two habit plane variants (HPVs) with V-shaped morphology connected to a B 19′ type I variant accommodation twin were observed. Three types of self-accommodation morphologies, based on the V-shaped minimum unit, developed around one of the {111} B2 traces, which were triangular, rhombic and hexangular and consisted of three, four and six HPVs, respectively. In addition, the variant selection rule and the number of possible HPV combinations in each of these self-accommodation morphologies are discussed..
7. Minoru Nishida, T. Hara, M. Matsuda, S. Ii, Crystallography and morphology of various interfaces in Ti-Ni, Ti-Pd and Ni-Mn-Ga shape memory alloys, Materials Science and Engineering A, 10.1016/j.msea.2007.01.179, 481-482, 1-2 C, 18-27, 2008.05, Crystallography and morphology of various interfaces in Ti-Ni, Ti-Pd and Ni-Mn-Ga shape memory alloys are investigated by transmission electron microscopy. Neither ledge nor step structures are recognized at the irrational interface of the <0 1 1>
B19′
type II twin in Ti-Ni martensite and the <1 2 1>
B19
type II twin in Ti-Pd martensite in the two dimensional lattice image from the η
1
direction. The combination of plate variants of the 10 and the 14 M Ni-Mn-Ga martensites is subsequently discussed. There are four plate variants commonly designated as A, B, C and D, and three fundamental plate combinations can be identified in a given plate group, namely A: B (C: D) of type II, A: C (B: D) of type I and A: D (B: C) of compound twins in both the martensites. An interesting phenomenon is the migration of A: D boundary in the 10 M martensite during the observation. Finally, we present the atomic structures of {1 1 4}
B2
Σ9 boundary in the B2 parent phase of Ti-Ni. The influence of heat treatment atmosphere on the boundary structures is also discussed..
8. M. Matsuda, S. Ii, Y. Kawamura, Y. Ikuhara, Minoru Nishida, Variation of long-period stacking order structures in rapidly solidified Mg97Zn1Y2 alloy, Materials Science and Engineering A, 10.1016/j.msea.2004.10.040, 393, 1-2, 269-274, 2005.02, The long-period stacking order (LPSO) structures in rapidly solidified Mg97Zn1Y2 alloy have been studied by conventional and high-resolution transmission electron microscopes (HRTEMs). There are four kinds of stacking sequences in the LPSO structures, i.e., 18R of ABABABCACACABCBCBC, 14H of ACBCBABABABCBC, 10H of ABACBCBCAB and 24R of ABABABABCACACACABCBCBCBC. The 18R structure is dominantly observed in the present study. The rest three are occasionally observed in places. The 10H and 24R structures are recently discovered. The lattice constants of 18R(1 1̄ 1 1̄ 2)3), 14H(2̄ 1 2̄ 1 1̄ 1 1̄ 2 1̄ 2), 10H(1 3̄ 1 1̄ 3 1̄) and 24R(1 1̄ 1 1̄ 1 1̄ 2)3 structures are estimated to be a = 0.320 nm and c = 4.678 nm, a = 0.325 nm and c = 3.694 nm, a = 0.325 nm and c = 2.603 nm, a = 0.322 nm and c = 6.181 nm for the hexagonal structure, respectively..
9. Minoru Nishida, T. Hara, Y. Morizono, A. Ikeya, H. Kijima, A. Chiba, Transmission electron microscopy of twins in martensite in Ti-Pd shape memory alloy, Acta Materialia, 10.1016/S1359-6454(97)00162-6, 45, 11, 4847-4853, 1997.01, Twins in the B19 martensite in the Ti-Pd shape memory alloy have been investigated by conventional transmission electron microscopy (CTEM) and electron diffraction. There were three twinning modes, i.e. {111} Type I, 〈121〉 Type II and {101} compound twins, in the martensite. The {111} Type I and 〈121〉 Type II twinnings which were conjugate to each other coexisted in a same martensite variant. The {111} Type I twins were dominantly observed and the 〈121〉 Type II twins were less frequently observed. The former twinning was considered to be a lattice invariant shear. The Type II twin plate appeared in two types of forms. The first one was directly connected to the Type I plate. In other words, the twin plate was inclined at crystallographically defined angle. The second one branched off from the Type I plate. Since there was no martensite variant consisting wholly of the 〈121〉 Type II twins throughout the present observations, the 〈121〉 Type II twins were considered to be a deformation twin due to the elastic interaction during the transformation. The {101} compound twinning was also considered to be a deformation twin which was introduced as result of elastic interactions during the transformation since the twin had an isolated fashion in the martensite variant consisting of {111} Type I twins..
10. Minoru Nishida, H. Ohgi, I. Itai, A. Chiba, K. Yamauchi, Electron microscopy studies of twin morphologies in B19′ martensite in the Ti-Ni shape memory alloy, Acta Metallurgica Et Materialia, 10.1016/0956-7151(94)00332-C, 43, 3, 1219-1227, 1995.01, Twins in the B19′ martensite in the Ti-Ni shape memory alloy have been investigated by conventional transmission electron microscopy (CTEM) and electron diffraction. The following five twinning modes were observed. The 〈011〉 Type II twin was dominantly observed among those and confirmed to be a lattice invariant shear since most martensite variants consisted of the 〈011〉 Type II twinning. The {111-} Type I twinning was morphologically and characteristically divided into three types, i.e. a deformation twin, a variant accommodation twin and a lattice invariant shear. (100) and (001) compound twinnings were considered to be a deformation twin. The 011 Type I twinning was inevitably reconfirmed and considered to be a lattice invariant shear rather than a deformation twin since it extended over the whole martensite plate. The formation order and mechanism of each twinning mode were qualitatively discussed in view of the elastic interaction accumulated during the martensitic transformation..
11. Minoru Nishida, K. Yamauchi, I. Itai, H. Ohgi, A. Chiba, High resolution electron microscopy studies of twin boundary structures in B19′ martensite in the Ti-Ni shape memory alloy, Acta Metallurgica et Materialia, 10.1016/0956-7151(94)00328-F, 43, 3, 1229-1234, 1995.01, The boundary structure of the 〈011〉 Type II, {111-} Type I, 011 Type I, (100) compound and (001) compound twins in the B19′ martensite in the Ti-Ni shape memory alloy was observed in the edge-on state by high resolution electron microscopy (HREM). The lattice images of the Type I and the compound twins exhibit the well-defined crystallographic features of those boundaries. Lattice image of the 〈011〉 Type II twin taken from the unique η1 axis suggests that neither ledge nor step structures are present at the irrational boundary..
12. Minoru Nishida, T. Tateyama, R. Tomoshige, K. Morita, A. Chiba, Electron microscopy studies of Ti - 47 at. % Al powder produced by plasma rotating electrode process, Scripta Metallurgica et Materiala, 10.1016/0956-716X(92)90522-G, 27, 3, 335-340, 1992.08.
13. Minoru Nishida, C. M. Wayman, T. Honma, Precipitation processes in near-equiatomic TiNi shape memory alloys, Metallurgical Transactions A, 10.1007/BF02650086, 17, 9, 1505-1515, 1986.09, Metallographic studies have been made of precipitation processes in Ti-50 pct Ni and Ti-52 pct Ni (at. pct) shape memory alloys. The eutectoid and peritectoid reactions previously reported for near-equiatomic and Ni-rich TiNi alloys were not observed for either composition. In the Ti-52Ni alloy, diffusional transformations take place, similar to those in supersaturated alloys. The precipitation sequence can be written as β
0
→ Ti
11
Ni
14
→ Ti
2
Ni
3
→ TiNi
3
. The solidus line of the TiNi phase in the Ti-52Ni alloy lies at 812 ± 22 °C. Morphological characteristics of the various precipitate phases are described in detail..
14. Minoru Nishida, T. Honma, All-round shape memory effect in Ni-rich TiNi alloys generated by constrained aging, Scripta Metallurgica, 10.1016/0036-9748(84)90125-X, 18, 11, 1293-1298, 1984.01.
15. Minoru Nishida, T. Honma, Effect of heat treatment on the all-round shape memory effect in Ti-5lat%Ni, Scripta Metallurgica, 10.1016/0036-9748(84)90126-1, 18, 11, 1299-1302, 1984.01.
Presentations
1. M. Nishida, Y. Soejima, H. Akamine, Dynamic Visualization of Thermoelastic Martensitic Transformation with In-situ SEM Observation, 11th European Symposium on Martensitic Transformations (ESOMAT2018), 2018.08.
2. Minoru Nishida, Yohei Soejima, Mitsuhara Masatoshi, SAHAR FARJAMI, Multiscale characterizations of martensitic transformation in Ti-Ni shape memory alloys, International Microscopy Congress, IMC 201, 2014.09.
3. Minoru Nishida, Yohei Soejima, Mitsuhara Masatoshi, SAHAR FARJAMI, Multiscale Visualization of Self-Accommodation Morphology of B19’ Martensite in Ti-Ni Shape Memory Alloy, International Conference on Martensitic Transformation 2014, 2014.07.
4. Minoru Nishida, Formation Process of Self-Accommodation Morphology of B19’ Martensite in Ti-Ni Alloys , TMS2013 Annual Meeting, 2013.03.
5. Minoru Nishida, Self-Accommodation of B19' Martensite in Ti-Ni Shape Memory Alloys, 4th International Conference of Smart Materials Structures Systems (CIMTEC2012), 2012.06.
6. Minoru Nishida, Tomonari Inamura, Morphology and Crystallography of Self-Accommodated B19’ Martensite in Ti-Ni Shape Memory Alloys, NIMS Conference 2012, 2012.06.
Membership in Academic Society
  • Association of Shape Memory Alloys
  • Materials Research Society
  • Japanese Society of Microscopy
  • Iron and Steel Institute of Japan
  • Japan Institute of Metals and Materials
Awards
  • Microstructural characterization, phase transformation and structure control in shape memory alloys
Educational
Educational Activities
The lectures on "Metallic Materials Science and Engineering" for undergraduate students of Department of Energy Science, Faculty of Engineering and "Crystal Physics Engineering" for graduate students of Department of Applied Science for Electronics and Materials, Interdisciplinary Graduate School of Engineering Sciences have been performed. 3 undergraduate, 11 master course and 2 doctor course students belong to the laboratory.
Other Educational Activities
  • 2014.10, Teaching Award of College of Engineering, Kyushu University 2014.