کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1499839 | 993323 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Graded phase structure in the surface layer of NiTi alloy processed by surface severe plastic deformation Graded phase structure in the surface layer of NiTi alloy processed by surface severe plastic deformation](/preview/png/1499839.png)
The graded phase structure and its evolution in the surface of NiTi alloy after surface mechanical attrition treatment are studied using transmission electron microscopy. The initial B2–B19′ phase transformation occurs at low strain level. As the deformation strain increases, the B19′ martensite phase transforms back to B2 phase giving rise to graded phases. Our study reveals that stress induced martensite transformation and deformation heating play important roles in the formation of this graded phase structure.
► NiTi alloy is subjected to surface mechanical attrition treatment.
► B2-B19′ phase transformation occurs at low strain level.
► B19′ transforms back to B2 with deformation strain increases.
► A graded phase structure is finally formed.
Journal: Scripta Materialia - Volume 64, Issue 11, June 2011, Pages 1011–1014