Phase Transformation and Its Effect on Mechanical Characteristics in Warm-Deformed Ti-29Nb-13Ta-4.6Zr Alloy

被引：15
|
作者：
Lee, Taekyung [1 ]
Nakai, Masaaki [2 ]
Niinomi, Mitsuo [2 ]
Park, Chan Hee [3 ]
Lee, Chong Soo [4 ]
机构：
[1] Pohang Univ Sci & Technol POSTECH, Ctr Adv Aerosp Mat, Pohang 790784, South Korea
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Korea Inst Mat Sci, Light Met Div, Chang Won 641831, South Korea
[4] Pohang Univ Sci & Technol POSTECH, GIFT, Pohang 790784, South Korea
来源：
METALS AND MATERIALS INTERNATIONAL | 2015年 / 21卷 / 01期
基金：
日本学术振兴会;
关键词：
titanium alloy; thermomechanical processing; mechanical properties; phase transformation; biomaterials; TI-NB-TA; DEFORMATION-INDUCED MARTENSITE; BIOMEDICAL APPLICATIONS; TITANIUM-ALLOYS; TENSILE PROPERTIES; MATERIALS SCIENCE; YOUNGS MODULUS; CARBON STEEL; ZR ALLOYS; MICROSTRUCTURE;
D O I：
10.1007/s12540-015-1025-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ti-29Nb-13Ta-4.6Zr (TNTZ) alloy has been extensively studied as it is promising for use in biomedical applications. Despite its potential, the effects of warm plastic deformation on the alloy have not yet been revealed. This study investigated the differences in phase constitution of two warm-deformed TNTZ alloys and revealed relevant mechanisms with particular attention to martensitic transformation. The influence of phase constituents on mechanical characteristics was discussed as well. The TNTZ alloy deformed at 823 K possessed alpha, beta, and omega phases as well as alpha '' martensite, and demonstrated a low Young's modulus and double-yielding phenomenon. In contrast, the alloy deformed at 723 K had no martensite but more omega phase, leading to increased strength, hardness, and Young's modulus. The absence of alpha '' martensite in the alloy deformed at 723 K was interpreted in light of beta-stability of the parent phase and reduced M-s temperature.
引用
收藏
页码：202 / 207
页数：6
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