کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
794102 | 1467170 | 2006 | 36 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental investigation on macroscopic domain formation and evolution in polycrystalline NiTi microtubing under mechanical force Experimental investigation on macroscopic domain formation and evolution in polycrystalline NiTi microtubing under mechanical force](/preview/png/794102.png)
This paper reports the experimental results on macroscopic deformation instability and domain morphology evolution during stress-induced austenite → martensite (A→M) phase transformation in superelastic NiTi polycrystalline shape memory alloy microtubes. High-speed data and image acquisition techniques were used to investigate the dynamic and quasi-static events which took place in a displacement-controlled quasi-static tensile loading/unloading process of the tube. These events include dynamic formation, self-merging, topology transition, convoluted front motion and front instability of a macroscopic deformation domain. The reported phenomena brought up several fundamental issues regarding the roles of macroscopic domain wall energy and kinetics as well as their interplay with the bulk strain energy of the tube in the observed morphology instability and pattern evolution under a mechanical force. These issues are believed to be essential elements in the theoretical modeling of macroscopic deformation patterns in polycrystals and need systematic examination in the future.
Journal: Journal of the Mechanics and Physics of Solids - Volume 54, Issue 8, August 2006, Pages 1568–1603