Analysis of Ductile Fracture Obtained by Charpy Impact Test of a Steel Structure Created by Robot-Assisted GMAW-Based Additive Manufacturing

被引：18

作者：

Waqas, Ali ^{[1
]}

Qin, Xiansheng ^{[1
]}

Xiong, Jiangtao ^{[1
]}

Zheng, Chen ^{[1
]}

Wang, Hongbo ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mech Engn, Xian 710072, Shaanxi, Peoples R China

来源：

METALS | 2019年 / 9卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Charpy impact test; GMAW; additive manufacturing; secondary cracks; LOW-CARBON; TOUGHNESS; TEMPERATURE; ARC; MICROSTRUCTURE; ENERGY; WIRE; MECHANISMS; DEPOSITION; STRENGTH;

D O I：

10.3390/met9111208

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, gas metal arc welding (GMAW) was used to construct a thin wall structure in a layer-by-layer fashion using an AWS ER70S-6 electrode wire with the help of a robot. The Charpy impact test was performed after extracting samples in directions both parallel and perpendicular to the deposition direction. In this study, multiple factors related to the resulting absorbed energy have been discussed. Despite being a layered structure, homogeneous behavior with acceptable deviation was observed in the microstructure, hardness, and fracture toughness of the structure in both directions. The fracture is extremely ductile with a dimpled fibrous surface and secondary cracks. An estimate for fracture toughness based on Charpy impact absorbed energy is also given.

引用

页数：12