作者
Janine Pfetzing‐Micklich, Martin Franz‐Xaver Wagner, Robert Zarnetta, Jan Frenzel, Gunther Eggeler, Athina Emmanuel Markaki, Jeff Wheeler, Trevor William Clyne
发表日期
2010/2
期刊
Advanced Engineering Materials
卷号
12
期号
1‐2
页码范围
13-19
出版商
WILEY‐VCH Verlag
简介
Nanoindentation is a suitable tool for characterizing the local mechanical properties of shape memory alloys (SMA) and to study their pseudoelastic behavior. There is a special interest in indenting with different indenter tips (as not all tips are associated with strain states that predominantly induce the martensitic transformation) and in indenting at different temperatures, where different phases are present. In this study, we perform nanoindentation on a ternary NiTiFe SMA with different indenter tips and at various testing temperatures. For nanoindentation with spherical tips, load–displacement hystereses clearly indicate pseudoelastic behavior, whereas indentation with Berkovich tips results in more pronounced plastic deformation. Testing at different temperatures is associated with different volume fractions of austenite, martensite, and R‐phase. The corresponding nanoindentation responses differ considerably in …
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J Pfetzing‐Micklich, MFX Wagner, R Zarnetta, J Frenzel… - Advanced Engineering Materials, 2010