Effects of the Cooling Rate on Mechanical Properties and Microstructure of Near-Α Ti-6al-3zr-2nb-Mo Alloy

20 Pages Posted: 19 Sep 2022

See all articles by Haiyang Jiang

Haiyang Jiang

affiliation not provided to SSRN

Fuqing Jiang

affiliation not provided to SSRN

Bijun Xie

Chinese Academy of Sciences (CAS) - Key Laboratory of Nuclear Materials and Safety Assessment

Bing Wang

affiliation not provided to SSRN

Bin Xu

Chinese Academy of Sciences (CAS) - Key Laboratory of Nuclear Materials and Safety Assessment

Xu Hu

affiliation not provided to SSRN

Liang Xu

affiliation not provided to SSRN

Zhangxun He

affiliation not provided to SSRN

Hao Zhang

affiliation not provided to SSRN

Yuxi Wu

affiliation not provided to SSRN

Mingyue Sun

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science; Chinese Academy of Sciences (CAS) - Institute of Metal Research

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Abstract

To quantitatively understand the influence of the cooling rate on the microstructural evolution and mechanical properties of titanium alloy forgings, we investigate the mechanical properties and microstructures of Ti-6Al-3Zr-2Nb-Mo (Ti6321) in different cooling mediums by combining mechanical tests, optical microscopy, scanning electron microscopy, and transmission electron microscopy. The results revealed that with the increase of the cooling rate, the width of the secondary α ( α s / α ´) phase decreased; therefore, the ultimate tensile and yield strengths increased. Furthermore, the impact property of alloy was decreased, which is attributed to the decreased volume fraction of the primary α ( α p ) phase. Based on in-depth structural characterizations and mechanical evaluations, the quantitative link between the cooling rate and the width of α s / α ´ phase, and a quantitative description of the relationship between the YS and the width of α s / α ´ phase are established. Our work provides theoretical guidance for the heat treatment of thick forging of Ti6321 for industrial production.

Keywords: Near-α Titanium alloy, Cooling rate, Mechanical Properties, Microstructure

Suggested Citation

Jiang, Haiyang and Jiang, Fuqing and Xie, Bijun and Wang, Bing and Xu, Bin and Hu, Xu and Xu, Liang and He, Zhangxun and Zhang, Hao and Wu, Yuxi and Sun, Mingyue, Effects of the Cooling Rate on Mechanical Properties and Microstructure of Near-Α Ti-6al-3zr-2nb-Mo Alloy. Available at SSRN: https://ssrn.com/abstract=4223483 or http://dx.doi.org/10.2139/ssrn.4223483

Haiyang Jiang

affiliation not provided to SSRN ( email )

No Address Available

Fuqing Jiang

affiliation not provided to SSRN ( email )

No Address Available

Bijun Xie

Chinese Academy of Sciences (CAS) - Key Laboratory of Nuclear Materials and Safety Assessment ( email )

Shenyang
China

Bing Wang

affiliation not provided to SSRN ( email )

No Address Available

Bin Xu (Contact Author)

Chinese Academy of Sciences (CAS) - Key Laboratory of Nuclear Materials and Safety Assessment ( email )

Shenyang
China

Xu Hu

affiliation not provided to SSRN ( email )

No Address Available

Liang Xu

affiliation not provided to SSRN ( email )

No Address Available

Zhangxun He

affiliation not provided to SSRN ( email )

No Address Available

Hao Zhang

affiliation not provided to SSRN ( email )

No Address Available

Yuxi Wu

affiliation not provided to SSRN ( email )

No Address Available

Mingyue Sun

Chinese Academy of Sciences (CAS) - Shenyang National Laboratory for Materials Science ( email )

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Chinese Academy of Sciences (CAS) - Institute of Metal Research ( email )

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