Microstructural evolution of laser solid forming Inconel 718 superalloy under different laser power

被引：10
|
作者：
Zhu, L. [1 ]
Xu, Z. F. [1 ]
Gu, Y. F. [1 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
MATERIALS LETTERS | 2018年 / 217卷
关键词：
Nickel based superalloy; Laser solid forming; Microstructure; Solution treatment; Recrystallization; MECHANICAL-PROPERTIES; RESIDUAL-STRESS; STRAIN FIELDS; RECRYSTALLIZATION; COMPONENTS;
D O I：
10.1016/j.matlet.2018.01.099
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work studies the influence of laser power on the microstructure of as-deposited and solution treated Inconel 718 (IN718) superalloy by laser solid forming (LSF) method. The morphologies of Laves phase are discrepant under different laser power. The formation of Nb and Mo rich Laves phase is found in the as-deposited IN718 superalloy. The grains vary with increasing laser power from 850 W to 1100 W. Fine and relative uniform grains of IN718 superalloy are obtained under laser power 1000 W after solution treated at 1100 degrees C for 1 h. When the laser power is 1000 W, the obtained IN718 superalloy has the highest residual stress in the overlap area. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：159 / 162
页数：4
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