On the measurement of effective powder layer thickness in laser powder-bed fusion additive manufacturing of metals

被引：51

作者：

Mahmoodkhani, Yahya ^{[1
]}

Ali, Usman ^{[1
]}

Shahabad, Shahriar Imani ^{[1
]}

Kasinathan, Adhitan Rani ^{[1
]}

Esmaeilizadeh, Reza ^{[1
]}

Keshavarzkermani, Ali ^{[1
]}

Marzbanrad, Ehsan ^{[1
]}

Toyserkani, Ehsan ^{[1
]}

机构：

[1] Univ Waterloo, Dept Mech & Mechatron Engn, Multiscale Addit Mfg Lab, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

来源：

PROGRESS IN ADDITIVE MANUFACTURING | 2019年 / 4卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Additive manufacturing; Laser-powder bed fusion; Effective layer thickness; DENSITY;

D O I：

10.1007/s40964-018-0064-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In laser powder-bed fusion (LPBF), the actual thickness of powder particles that spread on solidified zones, so-called effective layer thickness (ELT), is higher than the nominal layer thickness. The source cause of this discrepancy is the fact that powder particles substantially shrink after selective melting, followed by solidification. ELT, as an unknown parameter, depends on process parameters and material properties. In this study, an effective method to measure ELT is proposed and applied to 17-4 PH stainless steel for a nominal build layer thickness of 20 mu m. The measured ELT was larger than 100 mu m, which is far beyond the values reported in the literature. Results obtained from the current study show the effect of applying the ELT rather than the nominal build layer thickness in numerical modeling studies as well as understanding the governing physics in the LPBF process.

引用

页码：109 / 116

页数：8

共 16 条

[1] On the measurement of relative powder-bed compaction density in powder-bed additive manufacturing processes [J].