Transactions of Materials and Heat Treatment

Title：Influences of scanning method on mechanical properties at high temperature and thermal fatigue property of laser solid forming alloy GH4169

Authors： Liu Xiaoxuan Liu Jiangbo

Unit： Hebei Vocational College of Rail Transportation

KeyWords： laser solid forming scanning method superalloy GH4169 thermal fatigue property mechanical properties at high temperature

ClassificationCode：TG146

year,vol(issue):pagenumber：2017,42(12):140-143

Abstract：

Scanning method is an important process parameter of laser solid forming. Superalloy GH4169 specimens were produced by laser solid forming with three different kinds of scanning methods, and the specimens were conducted by mechanical test at high temperature of 500 ℃ and thermal fatigue tests between 25 ℃ and 500 ℃ for 1000 times. The results show that comparing with the parallel scanning along the long side, the tensile and yield strength of the alloy by alternate parallel scanning along the long and short sides are increased by 82 MPa and 79 MPa, and the elongation stain is unchanged basically, while the thermal fatigue crack grade changes from grade 7 to grade 2. The mechanical properties and thermal fatigue property of alloy by the parallel scanning along the short side are between parallel scanning along the long side and alternating parallel scanning along the long and short sides. Thus, the alternating parallel scanning of long and short sides is the optimized scanning method.

Funds：

河北省人力资源和社会保障厅科研项目（JRSHZ-2016-01126）

作者简介：刘晓璇（1983-），女，硕士，讲师 E-mail：xg9472@163.com 通讯作者：刘江波（1983-），男，硕士，讲师 E-mail：baobao727@163.com

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