Influence of Processing State on Recovery Stress in NiTiNb Shape Memory Alloy

Er Min Wang; Qi Hu Hong; Zhi Ming Ni; Jin Han

doi:10.4028/www.scientific.net/AMR.875-877.1525

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 875-877Influence of Processing State on Recovery Stress...

Influence of Processing State on Recovery Stress in NiTiNb Shape Memory Alloy

Abstract:

Self-made tension machine was used to measure the evolution of recovery stress under different processing state for NiTiNb alloy. Then, SEM was used to investigate the microstructure evolution. The results show that the range of the highest recovery stress for forged NiTiNb alloy is between 210-215MPa. Otherwise, the recovery stress level of the samples enduring cold drawing and hot rolling is basically same, which all belong to the rage of 210-220MPa. After forging, the firstly precipitated TiNi phase particles become fine, only 5-8μm. The Nb tablets in eutectic microstructure, which originally contributed between TiNi phase particles, appear spheroidization.

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Periodical:

Advanced Materials Research (Volumes 875-877)

Pages:

1525-1528

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.875-877.1525

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Online since:

February 2014

Authors:

Er Min Wang, Qi Hu Hong, Zhi Ming Ni, Jin Han

Keywords:

NiTiNb Alloy, Processing State, Recovery Stress

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