| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8001104 | Journal of Alloys and Compounds | 2014 | 20 Pages |
Abstract
We report the effect of aging on phase transformation temperature and mechanical strength of Ni50.3Ti29.7Hf20 high temperature shape memory alloy. Aging of the alloy at 550 °C and 650 °C increases the martensite phase transformation temperature. Transmission Electron Microscopy and quantitative investigation of microstructure by small-angle scattering confirm the improved hardness of the alloy on aging. Aging at 550 °C results in significant volume fraction of fine Ni-rich precipitates. Further, aging at 650 °C gives rise to coarsening of the precipitates vis-à -vis reduction in hardness.
Keywords
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Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Meenu Prasher, Debasis Sen,