Study of unique recrystallization kinetics in harmonic structure materials with outstanding mechanical properties

2020 Fiscal Year Annual Research Report

• Project/Area Number: 20K15064
• Research Institution: Ritsumeikan University
• Principal Investigator: SHARMA BHUPENDRA 立命館大学, 総合科学技術研究機構, 研究員 (70868603)
• Project Period (FY): 2020-04-01 – 2021-03-31
• Keywords: Harmonic Structure / Pref. Recrystallization / Titanium / Hetero structure / thermomechanical / Powder Metallurgy

Outline of Annual Research Achievements

The preferential recrystalization phenomenon were analyzed via thermo-mechanical process (TMP). TMP results in a peculiar preferential recrystallization localized in Shell region of the HS-Ti owing to the preferential strain localization in shell during plastic deformation. This successfully led to superior properties. The study was successfully accomplished with 4 journal papers and 2 conferences.

Research Products

• [Journal Article] Effect of stacking fault energy on deformation mechanisms in Cu and Cu-30% Zn alloy with gradient structure obtained by SMAT (2021)
  • Author(s): Liu Xiaomin、Nakatani Masashi、Gao Hongliang、Sharma Bhupendra、Pan Hongjiang、Fu Zhengrong、Li Xingfu、Ameyama Kei、Zhu Xinkun
  • Journal Title: Journal of Alloys and Compounds Volume: 865 Pages: 158863～158863
  • DOI: 10.1016/j.jallcom.2021.158863
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Extra-strengthening in a harmonic structure designed pure titanium due to preferential recrystallization phenomenon through thermomechanical treatment (2020)
  • Author(s): Sharma Bhupendra、Miyakoshi Motoki、Vajpai Sanjay Kumar、Dirras Guy、Ameyama Kei
  • Journal Title: Materials Science and Engineering: A Volume: 797 Pages: 140227～140227
  • DOI: 10.1016/j.msea.2020.140227
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Application of Hydride Process in Achieving Equimolar TiNbZrHfTa BCC Refractory High Entropy Alloy (2020)
  • Author(s): Sharma Bhupendra、Nagano Kentaro、Saxena Kuldeep Kumar、Fujiwara Hiroshi、Ameyama Kei
  • Journal Title: Crystals Volume: 10 Pages: 1020～1020
  • DOI: 10.3390/cryst10111020
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Harmonic Structure Design: A Strategy for Outstanding Mechanical Properties in Structural Materials (2020)
  • Author(s): Sharma Bhupendra、Dirras Guy、Ameyama Kei
  • Journal Title: Metals Volume: 10 Pages: 1615～1615
  • DOI: 10.3390/met10121615
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Outstanding Mechanical Properties in a Harmonic Structure Designed Titanium Due to Preferential Recrystallization (2020)
  • Author(s): Bhupendra Sharma
  • Organizer: TMS USA
  • Int'l Joint Research / Invited
• [Presentation] Improvement in Mechanical Properties of Harmonic Structured Ti through Preferential Recrystallization assisted grain refinement (2020)
  • Author(s): Bhupendra Sharma
  • Organizer: The Japan Institute of Metals and Materials
  • Int'l Joint Research