Invited Review Article: Review of the formation and impact of flaws in powder bed fusion additive manufacturing

被引：208

作者：

Snow, Zackary ^{[1
,2
]}

Nassar, Abdalla R. ^{[1
,2
]}

Reutzel, Edward W. ^{[1
,2
]}

机构：

[1] Penn State Univ, Appl Res Lab, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Engn Sci & Mech, 227 Hammond Bldg, University Pk, PA 16802 USA

来源：

ADDITIVE MANUFACTURING | 2020年 / 36卷

关键词：

Flaws; Powder bed fusion; Additive manufacturing; Defects; BEAM MELTING EBM; MECHANICAL-PROPERTIES; STAINLESS-STEEL; FATIGUE BEHAVIOR; TENSILE PROPERTIES; ALLOY TI-6AL-4V; HEAT-TREATMENT; POROSITY FORMATION; SURFACE-ROUGHNESS; LASER;

D O I：

10.1016/j.addma.2020.101457

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is widely accepted that gas porosity and lack-of-fusion flaws can degrade both static and dynamic mechanical performance of additively manufactured components, limiting the use of AM components in critical applications. However, the mechanisms by which these flaws form are still debated, and their impact on dynamic material performance have yet to be fully quantified. This work outlines the current understanding of the formation mechanisms for gas porosity, lack-of-fusion, and flaws related to melt pool instabilities. Where possible, the spatial and morphological characteristics of these flaws are highlighted, as well as their impact on mechanical properties. The effect of hot isostatic pressing is also discussed.

引用

页数：15

共 126 条

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