Transactions of Materials and Heat Treatment

Title：Ultrasonic evaluation technique of forging for magnesium-lithium alloy LA103Z

Authors： Shi Hongyuan Shao Hongliang Wang Rui

Unit： Xi′an Aeronautical Polytechnic Institute Shanghai Institute of Spacecraft Equipment Xi′an Sifang Ultralight Material Co. Ltd.

KeyWords： magnesium-lithium alloy forging forging deformation NDT ultrasonic wave attenuation coefficient

ClassificationCode：TB302.5

year,vol(issue):pagenumber：2018,43(2):0-0

Abstract：

For the difficulty of effective internal quality inspection caused by a serious attenuation of ultrasonic energy in the testing of magnesium-lithium alloy forgings, the magnesium-lithium alloy LA103Z forgings under different forging deformations were studied by metallographic observation, and the influences of different deformations on microstructure were analyzed. Then, the influences of different deformations on ultrasonic attenuation coefficient and longitudinal wave velocity of material were analyzed, and the influence of probe wafer size on ultrasonic attenuation coefficient was also studied. The results show that the greater the forging deformation of magnesium-lithium alloy LA103Z forging is, the more dense microstructure of α-phase magnesium-lithium alloy is. Furthermore, the ultrasonic attenuation coefficient decreases with the increasing of forging deformation, and the ultrasonic longitudinal wave velocity of material increases with the increasing of forging deformation. However, the ultrasonic attenuation coefficient decreases with the increasing of ultrasonic probe wafer size. Thus, with the enhancement of probe frequency, the acoustic attenuation coefficient and the sound velocity of material become larger for magnesium-lithium alloy under the same deformation.

Funds：

西安航空职业技术学院综合科研项目（17XHZH-004）

作者简介：史洪源（1986-），男，硕士，讲师 E-mail：shy2008x@163.com

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