Influence of Dilute Hf Additions on Precipitation and Martensitic Transformation in Ni-Ti-Pd Alloys

被引：0
|
作者：
Anne C. Coppa
Monica Kapoor
B. Chad Hornbuckle
Mark L. Weaver
Ronald D. Noebe
Gregory B. Thompson
机构：
[1] The University of Alabama,Department of Metallurgical & Materials Engineering
[2] NASA Glenn Research Center,undefined
来源：
JOM | 2015年 / 67卷
关键词：
Martensitic Transformation; Shape Memory; Transformation Temperature; Shape Memory Effect; Atom Probe;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effect of Hf (0–1 at.%) additions in a Ni-Ti-Pd alloy on P-phase precipitation and martensitic transformations was studied. The addition of hafnium resulted in the refinement of precipitates with an increase in number density. The overlapping strain fields created due to the decrease in inter-precipitate spacing are suspected to reduce the matrix volume to be less than the critical free volume size needed for the martensitic transformation over the temperature range studied (183–573 K). Hafnium was also found to delay the aging time to achieve peak hardness, suggesting a reduction in growth and coarsening kinetics.
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页码：2244 / 2250
页数：6
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