董光能
- 教授
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- E-Mail:
- Date of Employment:1989-06-01
- Education Level:With Certificate of Graduation for Doctorate Study
- Professional Title:教授
- Status:Employed
- Alma Mater:西安交通大学
- College:School Of Mechanical Engineering
- Discipline:Mechanical Engineering
- Papers
The deformation behavior of TiNi shape memory alloy under axial dynamic compression
Release Time:2025-04-30 Hits:
- Date:2025-04-30
- Title of Paper:The deformation behavior of TiNi shape memory alloy under axial dynamic compression
- Journal:Journal of Wuhan University of Technology
- Summary:The deformation behavior of Ti-50.9 at % Ni shape memory alloy under axial compression dynamic loads was investigated by an MTS 858 Mini Bionix test machine. The alloy were aged at 500°C for an hour before being machined into specimens. The compression experiments were conducted at 20°C and the variety of dynamic loads were controlled by the strain rate, which was 3 mm/min, 15 mm/min, 30mm/min and 50 mm/min, respectively. The experimental results indicate that in the case of 3 mm/min, stress-induced martensitic transformation occurs at about 350 MPa when loading and reverse transformation at about 200 MPa when unloading, during which the aged Ti-50.9 at % Ni alloy shows the recoverable nonlinear pseudoelastic strain of 4.3% with the residual strain of 1.2% reserved. With the strain rate increasing, the area encloses by loading-curve and unloading-curve, i.e stress (strain) hysteresis becomes smaller and smaller and the residual strain also decreases, while critical stress for inducing martensitic transformation rises. At a higher strain rate the alloy exhibits linear-like pseudoelasticity, which is up to 4.5%.
- Co-author:Guang-Neng Dong，el
- Volume:19（3）（2004）
- Page Number:86-90
- Translation or Not:No
- Date of Publication:2004-10-01