Phase transformation kinetics of Ti-1300 alloy during continuous heating

被引：28

作者：

Wan, Ming-Pan ^{[1
,2
]}

Zhao, Yong-Qing ^{[3
]}

Zeng, Wei-Dong ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

[3] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China

来源：

RARE METALS | 2015年 / 34卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Ti-1300; alloy; Phase transformation; Dilatometry; Kinetics; CRYSTALLIZATION KINETICS; TENSILE PROPERTIES; MICROSTRUCTURE; TEMPERATURE; BEHAVIOR;

D O I：

10.1007/s12598-015-0472-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The alpha + beta -> beta phase transformation kinetics of Ti-1300 alloy during continuous heating at different heating rates were investigated using dilatometric method. Results show that the curves of the alpha + beta -> beta phase transformation exhibit a typical S-shaped pattern, which indicates that the alpha + beta -> beta phase transformation is a nucleation-growth-controlled process. The overall activation energy of the alpha + beta -> beta transformation of the alloy is 797 kJ center dot mol(-1). The nucleation and growth mechanism of the alpha A + beta -> beta transformation was also investigated using the non-isothermal Avrami exponent. The Avrami exponent during alpha + beta -> beta transformation process significantly changes with transformed volume fraction increasing, which indicates that the alpha + beta -> beta transformation mechanism in the Ti-1300 alloy varies at different sections.

引用

页码：233 / 238

页数：6

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