Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5457537 | Intermetallics | 2017 | 5 Pages |
Abstract
In this study, the stress-induced martensitic (SIM) transformation of a recently developed metastable β-type Ti-33Nb-4Sn alloy consisting of a mixture of β and αⳠphases are investigated by in situ synchrotron X-ray diffraction (SXRD). It is shown that though the SIM transformation covers a wide strain range, some remaining β phase is still observed after loading, indicating that the SIM transformation is incomplete. During SIM, the parameter of bαⳠincreases with macroscopic strain within the strain range of 1.5-4.7%, while the parameters of aαⳠ([100]αâ³) and cαⳠ([002]αâ³) remain constant or decrease with increasing strain, respectively. This provides a plausible explanation for why the (020)αⳠpeak intensifies, but the (002)αⳠpeak decreases and even eliminates in the loading direction during loading. Additionally, the activation sequence of different deformation mechanisms is clarified unambiguously.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shun Guo, Yao Shang, Junsong Zhang, Qingkun Meng, Xiaonong Cheng, Xinqing Zhao,