TY - JOUR
T1 - Surface morphology evolution of GTD-450 stainless steel during laser powder bed fusion
AU - Hao, Jiabao
AU - Wei, Lei
AU - Yang, Haiou
AU - Bao, Ting
AU - Zhou, Fan
AU - Cui, Yimin
AU - Lin, Xin
AU - Huang, Weidong
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/7
Y1 - 2023/7
N2 - GTD-450 is a new type of maraging stainless steel. It has a wide application prospect in the additive manufacturing of complex components such as GTD-450 compressor blades using L-PBF technology. In this study, a multi-scale numerical model was used to simulate the whole process of L-PBF forming of GTD-450 stainless steel block. This numerical model can describe the evolution process of L-PBF forming temperature field, melt flow field and melt free surface. With the help of simulation results, the surface morphology of GTD-450 stainless steel formed under different layers is clarified. The experimental and numerical data of surface morphology are in good agreement, which verifies the reliability of the numerical model. Based on the experimental results, the influence mechanism of melt pool behaviour and thermal history on melt solidification behaviour was discussed, and the development process of L-PBF block surface morphology under the influence of melt pool behaviour was explained.
AB - GTD-450 is a new type of maraging stainless steel. It has a wide application prospect in the additive manufacturing of complex components such as GTD-450 compressor blades using L-PBF technology. In this study, a multi-scale numerical model was used to simulate the whole process of L-PBF forming of GTD-450 stainless steel block. This numerical model can describe the evolution process of L-PBF forming temperature field, melt flow field and melt free surface. With the help of simulation results, the surface morphology of GTD-450 stainless steel formed under different layers is clarified. The experimental and numerical data of surface morphology are in good agreement, which verifies the reliability of the numerical model. Based on the experimental results, the influence mechanism of melt pool behaviour and thermal history on melt solidification behaviour was discussed, and the development process of L-PBF block surface morphology under the influence of melt pool behaviour was explained.
KW - Additive manufacturing
KW - GTD-450 stainless steel
KW - Laser powder bed fusion
KW - Multi-scale numerical model
KW - Surface morphology
UR - http://www.scopus.com/inward/record.url?scp=85152621687&partnerID=8YFLogxK
U2 - 10.1016/j.vacuum.2023.112107
DO - 10.1016/j.vacuum.2023.112107
M3 - 文章
AN - SCOPUS:85152621687
SN - 0042-207X
VL - 213
JO - Vacuum
JF - Vacuum
M1 - 112107
ER -