Abstract
Influence of Ni content on the stability of martensitic transformation and microstructure evolution was investigated in Zr50Cu 50-xNix (x = 0, 5, 10, 15). Microstructural observations revealed that the both B19′ and Cm martensites were present in all the alloys investigated. The thermal behaviors results indicated that the initial Ms increased from 433 K to 699 K with an increase of Ni content from 5 to 15 mol.%. For x = 5, the forward and reverse martensitic transformation disappeared after thermal cycling. For x = 10 and 15, both transformation still remained even after 10 cycles. Two-step transformation behaviors were observed on both forward and reverse transformation in x = 15 alloy. Ni addition decreased the transformation hysteresis. Microstructural observations revealed the Ni addition up to 10 mol.% suppressed the decomposition of ZrCu into Zr 2Cu and τ5 phases during 10 thermal cycling treatments. These results indicated that the addition of Ni over 10 mol.% stabilized the martensitic transformation during thermal cycling.
Original language | English |
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Pages (from-to) | S136-S140 |
Journal | Journal of Alloys and Compounds |
Volume | 577 |
Issue number | SUPPL. 1 |
DOIs | |
Publication status | Published - 2013 Nov 15 |
Keywords
- Martensitic transformation
- Microstructure
- Shape memory effect
- Thermal stability
- Zr-Cu-Ni
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry