Transactions of Materials and Heat Treatment

Title：Influence of TA15 titanium alloy slab structure on ultrasonic flaw detection and performance

Authors： Yang Lixin1 Wang Deyong1 Wang Fuqiang1 Yuan Zhanjun2 He Jian2

Unit： 1. Shenyang Aircraft Industry (Group) Co. Ltd. 2. Shaanxi Hongyuan Aviation Forging Co. Ltd.

KeyWords： TA15 titanium alloy slab structure forgings ultrasonic flaw detection grain streamline microstructure and performance

ClassificationCode：TG319；TG146.23

year,vol(issue):pagenumber：2021,46(12):228-235

Abstract：

The ultrasonic testing of TA15 titanium alloy slab forgings was conducted by different ultrasonic flaw detection methods, and the relationship between ultrasonic flaw detection and microstructure performance was studied. The results show that the excessive clutter is detected in local area of TA15 titanium alloy slab by I3-1008-R(10 MHz flat probe), and when the three probes of HGE-5827-A(10 MHz focusing probe), I7-0512-RG (5 MHz focusing probe), I3-0508-3 (5 MHz flat probe) three probes are used to C-scan detecting of excessive clutter area, the abnormal signals show certain directionality, but all the evaluation results are qualified. Furthermore, there is a thin strip-like grain streamline distribution in the longitudinal low magnification microstructure in the buried depth of exceeding area of flaw dection, while the high magnification microstructure is a typical two-state microstructure, and the content, morphology and mechanical properties of α phase are not significantly different from the normal area of flaw detection. By comparative analysis of microstructure layer by layer, it can be determined that the exceeding area of flaw detection is not forging and metallurgical defects, but the abnormal signal display caused by the flat and wide grain streamline.

Funds：

杨立新(1983-)，男，工学学士，高级工程师 E-mail：lixinyang198303@163.com

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