Effect of Ultrasonic Vibration and Heat Treatment on Microstructure and Mechanical Properties of IN718 Superalloy by Laser Direct Forming

被引：0

作者：

Wang Tan ^{[1
]}

Zhang Anfeng ^{[1
]}

Liang Shaoduan ^{[1
]}

Zhang Xiao ^{[1
]}

Yan Shenping ^{[1
]}

Zhang Lianzhong ^{[1
]}

Li Dichen ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Shaanxi, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2018年 / 47卷 / 11期

关键词：

laser technique; laser direct forming; ultrasonic vibration; IN718; superalloy; microstructure; tensile property;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of ultrasonic vibration and heat treatment on the microstructure and tensile properties of IN718 superalloy by laser direct forming (LDF) were investigated. The results show that microstructure of 1N718 superalloy with ultrasonic vibration is refined compared with that of the as-deposited alloy. In addition, the microhardness and tensile properties of the parts fabricated by LDF with ultrasonic vibration are improved compared with that of the ones fabricated by LDF without ultrasonic vibration, and the tensile strength, yield strength and area reduction are increased by 2.7%, 6.1% and 10.6%, respectively. With the heat treatment of homogenization, solution and double aging, the columnar dendrites change to equiaxed grains due to recrystallization. Laves phase dissolves, and there are grainy and acicular delta phase distributed in and along boundaries of the grains. Besides, a large number of strengthening phase y '' and y' are precipitated on the matrixes. After heat treatment, the tensile strength, yield strength and elongation are 1418 MPa, 1217 MPa and 19%, respectively, which conform to the wrought standard of Q/3B 548-1996.

引用

页码：3499 / 3503

页数：5

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