Superplasticity of Ti2448 Alloy with Nanostructured Grains

查看全文 作　　者：M.J. [1]Xiao;Y.X. [2]Tian;G. W. [1]Mao;S.J. [2]Li;Y.L. [2]Hao;R. [2]Yang

机构地区：[1]School of Astronautics, Northwestern Polytecllnic University, Xi'an 710072, China -;[2]Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

出　　处：《Journal of Materials Science & Technology》索引2011年第27卷第12期,共6页

基　　金：supported by the National Natural Science Foundation of China (Nos. 51071152and 50901080);the National High Technology Research and Development Program of China (No.2011AA030106) 摘　　要：Ti-24Nb-4Zr-8Sn, abbreviated as Ti2448 from its chemical composition in weight percent, is a multifunctional β type titanium alloy with body centered cubic (bcc) crystal structure, and its highly localized plastic deformation behavior contributes significantly to grain refinement during conventional cold processing. In the paper, the nanostructured (NS) alloy with grain size less than 50 nm produced by cold rolling has been used to investigate its superplastic deformation behavior by uniaxial tensile tests at initial strain rates of 1.5×10-2, 1.5×10-3 and 1.6×10-4 s-1 and temperatures of 600, 650 and 700℃. The results show that, in comparison with the coarse-grained alloy with size of 50 μm, the NS alloy has better superplasticity with elongation up to ~275% and ultimate strength of 50–100 MPa. Strain rate sensitivity (m) of the NS alloy is 0.21, 0.30 and 0.29 for 600, 650 and 700℃, respectively. These results demonstrate that grain refinement is a valid way to enhance the superplasticity of Ti2448 alloy. 关键词：Titanium alloy bcc crystal SUPERPLASTICITY Nanostructured grain

相关文献

参考文献（37）
引证文献（4）
耦合文献（0）

参考文献(37)

引证文献(4)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Superplasticity of Ti2448 Alloy with Nanostructured Grains

参考文献(37)

引证文献(4)

用户提示