1. Shape memory effect and superelasticity of (TiZrHf)–Mo–Sn multi-principal element alloy with low magnetic susceptibilityHiroto Tanaka, Jongbin Go, Wataru Tasaki, Tamotsu Koyano, Hee Young Kim
Scripta Materialia 286 (2027) 117549.
ABOUT OUR LAB
Kim–Go Laboratory
Our laboratory was founded at the University of Tsukuba in 1979 by Professor Emeritus Shuichi Miyazaki and has conducted research on shape memory and superelastic alloys for many years. Throughout this history, we have built deep expertise and extensive practical know-how in shape memory and superelasticity, producing numerous outstanding research achievements. Since 2015, under the leadership of Professor Hee Young Kim, we have continued this tradition by developing functional metallic materials for medical and engineering applications. Today, we combine experimental research with a wide range of approaches, including computational science and machine learning, to design and develop new functional alloys. We also pursue international collaborations in computational research as needed.
Research Highlights
SHAPE MEMORY · SUPERELASTICITY
Biomedical Shape Memory & Superelastic Alloys
We develop Ti-based, Zr-based, and high-entropy shape memory and superelastic alloys that combine biocompatibility with advanced mechanical functions.
Explore this research →
LOW MODULUS · BIOMECHANICS
Low-Modulus Alloys for Biomedical Use
We study Ti- and Zr-based low-modulus alloys and processing routes that provide bone-compatible flexibility while retaining strength and durability.
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MACHINE LEARNING · ALLOY DESIGN
Machine-Learning-Guided Alloy Design
We combine experimental and computational data with machine learning to discover alloy compositions, processes, and microstructures that deliver targeted properties.
Explore this research →Selected Publications
1. Shape memory effect and superelasticity of (TiZrHf)–Mo–Sn multi-principal element alloy with low magnetic susceptibility
2. Effects of oxygen concentration and phase stability on nano-domain structure and thermal expansion behavior of Ti–Nb–Zr–Ta–O alloysHee Young Kim, Shuichi Miyazaki
Acta Materialia 100 (2015) 313-322.
3. Heating-induced martensitic transformation and time-dependent shape memory behavior of Ti–Nb–O alloyMasaki Tahara, Takafumi Kanaya, Hee Young Kim, Tomonari Inamura, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 80 (2014) 317-326.
4. Nanodomain structure and its effect on abnormal thermal expansion behavior of a Ti–23Nb–2Zr–0.7Ta–1.2O alloyHee Young Kim, Lesi Wei, Shuhei Kobayashi, Masaki Tahara, Shuichi Miyazaki
Acta Materialia 61 (2013) 4874-4886.
5. Room temperature aging behavior of Ti–Nb–Mo-based superelastic alloysYazan Al-Zain, Yosuke Sato, Hee Young Kim, Hideki Hosoda, Tae Hyun Nam, Shuichi Miyazaki
Acta Materialia 60 (2012) 2437-2447.
6. Formation of nanoscaled precipitates and their effects on the high-temperature shape-memory characteristics of a Ti50Ni15Pd25Cu10 alloyM. Imran Khan, Hee Young Kim, Tae Hyun Nam, Shuichi Miyazaki
Acta Materialia 60 (2012) 5900-5913.
7. Lattice modulation and superelasticity in oxygen-added β-Ti alloysMasaki Tahara, Hee Young Kim, Tomonari Inamura, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 59 (2011) 6208-6218.
8. Anomalous temperature dependence of the superelastic behavior of Ti–Nb–Mo alloysYazan Al-Zain, Hee Young Kim, T. Koyano, Hideki Hosoda, Tae Hyun Nam, Shuichi Miyazaki
Acta Materialia 59 (2011) 1464-1473.
9. Shape memory properties of Ti–Nb–Mo biomedical alloysYazan Al-Zain, Hee Young Kim, Hideki Hosoda, Tae Hyun Nam, Shuichi Miyazaki
Acta Materialia 58 (2010) 4212-4223.
10. Crystallization process and shape memory properties of Ti–Ni–Zr thin filmsHee Young Kim, Masashi Mizutani, Shuichi Miyazaki
Acta Materialia 57 (2009) 1920-1930.
11. Cyclic deformation behavior of a Ti–26 at.% Nb alloyMasaki Tahara, Hee Young Kim, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 57 (2009) 2461-2469.
12. Self-accommodation in Ti–Nb shape memory alloysY. W. Chai, Hee Young Kim, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 57 (2009) 4054-4064.
13. Martensitic transformation, shape memory effect and superelasticity of Ti–Nb binary alloysHee Young Kim, Yuzuru Ikehara, Jae Il Kim, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 54 (2006) 2419-2429.
14. Texture and shape memory behavior of Ti–22Nb–6Ta alloyHee Young Kim, T. Sasaki, Kazutoshi Okutsu, Jae Il Kim, Tomonari Inamura, Hideki Hosoda, Shuichi Miyazaki
Acta Materialia 54 (2006) 423-433.
15. Stability of lamellar microstructure of hard orientated PST crystal of TiAl alloyHee Young Kim, Kouichi Maruyama
Acta Materialia 51 (2003) 2191-2204.
16. Parallel twinning during creep deformation in soft orientation PST crystal of TiAl alloyHee Young Kim, Kouichi Maruyama
Acta Materialia 49 (2001) 2635-2643.
Study and Research at Kim-Go Laboratory
Career Paths
Industry
Toyota, Nissan, Honda, Mazda, Nippon Steel, JFE Steel, Kobe Steel, Mitsubishi Materials, Panasonic, Hitachi, and others
Learn more →Research & Academia
NIMS, AIST, JAXA Institute of Space and Astronautical Science, and universities in Japan and abroad
Learn more →LABORATORY FAQ
View questions and answers Frequently Asked Questions
Find answers about a typical day in the laboratory, research topics and facilities, mentoring, internships, graduate study, publications, and student life.
News & Events
2026
2026/10/08
2026/10/02
Congratulations to Yosuke Sato on the publication of his first-author paper in Journal of Materials Research and Technology!
Title: Effects of Ti/Zr ratio and Nb content on shape memory effect and superelasticity in Ti–Zr–Nb–Sn alloys
2026/09/26
We attended the meeting at Akita University's Tegata Campus on September 23–25. Taketo Yamaguchi (M2), Gaku Otsuka (M1), and Tsukasa Katayanagi (M1) gave poster presentations.
2026/09/26
Congratulations to Takahisa Nambu, who completed his master’s degree in 2026, on the publication of his first-author paper in Materials Letters!
Title: Shape memory effect, superelasticity, and magnetic susceptibility of Ti–Hf-based alloys
2026/09/13
We updated the scholarship information for prospective international students.
2026/09/12
Congratulations to Hiroto Tanaka, who completed his master’s degree in 2026, on the publication of his first-author paper in Scripta Materialia! The paper was published online on August 21, 2026.
Title: Shape memory effect and superelasticity of (TiZrHf)–Mo–Sn multi-principal element alloy with low magnetic susceptibility
2026/09/12
The alumni page has been updated.
2026/08/28
We improved the website's display and usability.
2026/08/27
We have added a Frequently Asked Questions page for students considering joining our laboratory.
2026/08/22
The research highlights, selected publications, and career information have been updated.
2026/08/14
The website has been updated.
2026/08/03
The website has been updated.
2026/05/13
The members page has been updated.
2026/03/23
Megumi Furuhashi received the Best Master’s Thesis Presentation Award.
2026/03/01
The website has been updated.
2025
2025/03/26
The members page has been updated.