Laser & Optoelectronics Progress, Volume. 60, Issue 7, 0714008(2023)
Effect of Energy Density on Microstructure and Mechanical Properties of Hydrogen Resistant Steel HR-2 Selective Laser Melting Parts
An HR-2 hydrogen embrittlement resistant stainless steel was subjected to selective laser melting process testing performed at different levels of volume energy density. The microstructure and properties of the formed parts were characterized. The results revealed that, for a certain range of volume energy density values, the density, microhardness, tensile strength, and elongation of the parts increased with increasing volume energy density. At the maximum energy density of 113.3 J/mm3, the maximum density of the formed part, corresponding tensile strength, yield strength, elongation after fracture, and reduction in area were 99.9%, 765.5 MPa, 634 MPa, 44.0%, and 61%, respectively. These values satisfy the performance requirements of HR-2 forging specified in the GJB 5724 standard. The printed structure of HR-2 is composed of columnar crystals, with equiaxed grains in
Get Citation
Copy Citation Text
Ningzhao Liu, Guowei Wang, Yu Qin, Kaijia Wang, Xianfeng Shen. Effect of Energy Density on Microstructure and Mechanical Properties of Hydrogen Resistant Steel HR-2 Selective Laser Melting Parts[J]. Laser & Optoelectronics Progress, 2023, 60(7): 0714008
Category: Lasers and Laser Optics
Received: Dec. 7, 2021
Accepted: Feb. 21, 2022
Published Online: May. 24, 2023
The Author Email: Shen Xianfeng (xianfeng_shen@163.com)