Effect of Aging Temperature and time on the Transformation Behavior of a Ti-50.8 at.% Ni Alloy with Small Grains. (2015)

• Record Type: Journal Article
• Authors: Wang, X.; Verlinden, B.; Van Humbeeck, J.
• Is Part Of: Materials today. Volume 2(2015)Supplement 3
• Page Start: S565
• Page End: S568
• Publication Date: 2015
• Subjects: NiTi -- phase transformation -- grain size -- aging.; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2015.07.348
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: A Ti-50.8 at.% Ni alloy with small grains (average grain size of 1.8 μm) was subjected to various aging treatments. It is found that the frequently reported multi-stage martensitic transformation, i.e. the transformation including two B19' martensite or two rhombohedral R-phase transformations, is absent in this study. The samples aged at 523–573 K show a single stage austenite↔R-phase transformation. A normal austenite→R-phase→martensite transformation is detected in the samples aged at 623–823 K. The origin of this phenomenon and the effect of grain size on the aging microstructure is discussed.