Enhancing ductility and fatigue strength of additively manufactured metallic materials by preheating the build platform
Enhancing ductility and fatigue strength of additively manufactured metallic materials by preheating the build platform
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通过预热构建平台提高增材制造金属材料的延展性和疲劳强度
DOI：
10.1111/ffe.13372
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发表时间：
2021
影响因子：
3.7
通讯作者：
Phan, Nam
中科院分区：
文献类型：
--
作者：
Nezhadfar, P.D.;Shamsaei, Nima;Phan, Nam
研究了预热预热成型平台(工艺)对316L不锈钢(SS)的显微组织/缺陷结构(结构)以及拉伸和疲劳行为(性能)的影响。与未预热(NP)的情况相比，将施工平台预热到150°C(P150)会影响温度梯度和冷却速度，从而减少体积缺陷(即气孔和未熔合(LoF))。与NP钢相比，P150 LBPbF316L不锈钢的塑性得到改善，这是由于P150状态下的体积缺陷较少以及晶向的变化所致。此外，预热搭建平台可以提高LB-PBF 316L不锈钢试件的疲劳抗力。这与P150样本中的体积缺陷比NP样本中的缺陷更少和更小有关。
The effect of preheating the build platform (process) on the microstructure/defect structure (structure) as well as the tensile and fatigue behaviour (property) of the laser beam powder bed fused (LB‐PBF) 316L stainless steel (SS) is investigated. Preheating the build platform to 150°C (P150) affects the thermal gradient and cooling rate resulting in the reduction of the volumetric defects (i.e., gas‐entrapped pores and lack of fusion (LoF)) as compared with the condition where the build platform is non‐preheated (NP). The ductility of P150 LB‐PBF 316L SS is improved as compared with the NP counterpart, resulting from the less volumetric defects as well as the change in the crystallographic orientation of the grains in P150 condition. In addition, preheating the build platform is found to enhance the fatigue resistance of LB‐PBF 316L SS specimens. This is associated with fewer and smaller volumetric defects in P150 specimens as compared with the NP ones.
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作者：
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通讯作者：
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DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
R. Shrestha;P. D. Nezhadfar;M. Masoomi;J. Simsiriwong;Nam Pha;N. Shamsaei
通讯作者：
N. Shamsaei