Transactions of Materials and Heat Treatment

Title：Influence of duplex microstructure characteristic for TA15 titanium alloy on ultrasonic flaw detect

Authors： Wang Zhe Ran Xing Zhai Jiangbo Feng Xiaoyan Zhang Shuai Cai Song

Unit： Shaanxi Hongyuan Aviation Forging Co. Ltd. Tsinghua University AVIC Heavy Machinery Co. Ltd.

KeyWords： TA15 titanium alloy duplex microstructure ultrasonic flaw detect clutter α phase

ClassificationCode：TG139

year,vol(issue):pagenumber：2022,47(5):52-56

Abstract：

For the phenomenon of catastrophic accidents caused by microstructure defects for TA15 titanium alloy during service process, the relationship between duplex microstructure characteristics and ultrasonic flaw detection clutter level of TA15 titanium alloy forgings under different hot working conditions was investigated by optical microscope (OM) and ultrasonic flaw detection equipment. The results show that the ultrasonic flaw detection clutter level of TA15 titanium alloy is affected by the content and morphology of primary αp phase and the thickness of lamellar α phase. With the increasing of primary αp phase and uniform distribution of morphology, the ultrasonic flaw detection clutter level decreases. The appearance of coarse and orderly arranged lamellar α phase in the microstructure of TA15 titanium alloy results in higher flaw detection clutter level, while the lower flaw detection clutter level caused by disordered and fine lamellar α phase. When the banded α phase structure appears in the microstructure of TA15 titanium alloy forgings, the ultrasonic flaw detection clutter level of this part increases significantly. So the appearance of the structure should be avoided in the hot working process.

Funds：

两机重大专项基础研究(J2019-Ⅶ-002)

作者简介：王哲（1987-），男，博士，高级工程师，E-mail：tianchenzhe@163.com；通信作者：冉兴(1968-)，男，博士研究生，研究员，E-mail：2560680637@qq.com

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