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Crystals 2018, 8(9), 345; https://doi.org/10.3390/cryst8090345

Microstructure and Phase Transformation Analysis of Ni50−xTi50Lax Shape Memory Alloys

1
College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
2
College of Arts and Sciences, Shanghai Maritime University, Shanghai 201306, China
*
Author to whom correspondence should be addressed.
Received: 20 July 2018 / Revised: 16 August 2018 / Accepted: 24 August 2018 / Published: 29 August 2018
(This article belongs to the Special Issue Microstructures and Properties of Martensitic Materials)
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Abstract

The microstructure and martensitic transformation behavior of Ni50−xTi50Lax (x = 0.1, 0.3, 0.5, 0.7) shape memory alloys were investigated experimentally. Results show that the microstructure of Ni50−xTi50Lax alloys consists of a near-equiatomic TiNi matrix, LaNi precipitates, and Ti2Ni precipitates. With increasing La content, the amounts of LaNi and Ti2Ni precipitates demonstrate an increasing tendency. The martensitic transformation start temperature increases gradually with increasing La content. The Ni content is mainly responsible for the change in martensite transformation behavior in Ni50−xTi50Lax alloys. View Full-Text
Keywords: martensitic transformation; microstructure; Ni–Ti–La martensitic transformation; microstructure; Ni–Ti–La
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Li, W.; Zhao, C. Microstructure and Phase Transformation Analysis of Ni50−xTi50Lax Shape Memory Alloys. Crystals 2018, 8, 345.

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