Influence of scale effect on surface morphology in laser powder bed fusion technology

被引：25

作者：

Feng, Zhe ^{[1
,2
]}

Wang, Geng ^{[3
]}

Hao, Zhiwei ^{[1
,2
]}

Wang, Yongxia ^{[1
,2
]}

Tan, Hua ^{[1
,2
,6
]}

Fan, Wei ^{[4
]}

Dang, Mingji ^{[1
,2
]}

Zhang, Siyu ^{[1
,2
]}

Chen, Yuguang ^{[1
,2
]}

Peng, Yijie ^{[1
,2
]}

Zhang, Tianchi ^{[1
,2
]}

Shi, Shuoqing ^{[1
,2
]}

Wei, Lei ^{[1
,2
]}

Zhang, Fengying ^{[5
]}

Lin, Xin ^{[1
,2
]}

Huang, Weidong ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian, Peoples R China

[2] Northwestern Polytech Univ, MIIT China, Key Lab Met High Performance Addit Mfg & Innovat D, Xian, Shaanxi, Peoples R China

[3] Beijing Inst Remote Sensing Equipment, Beijing, Peoples R China

[4] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore Ctr 3D Printing, Singapore, Singapore

[5] Changan Univ, Sch Mat Sci & Engn, Xian, Peoples R China

[6] Northwestern Polytech Univ, State Key Lab Solidificat Proc, 127 Youyi West Rd, Xian, Shaanxi, Peoples R China

来源：

VIRTUAL AND PHYSICAL PROTOTYPING | 2024年 / 19卷 / 01期

关键词：

Laser powder bed fusion; scale effect; surface morphology; scanning strategy; PROCESS PARAMETERS; ROUGHNESS; BEHAVIOR; MODEL;

D O I：

10.1080/17452759.2024.2336157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser powder bed fusion (LPBF) of multi-scaled structures is a prominent direction pursued by innovative designs and engineering applications. However, understanding the impact of scale effect on the effectiveness of actual structures is a pressing challenge. This work investigates the influence of structure scale on surface morphology and mechanical property by fabricating tensile samples with gauge diameters ranging from 0.2 mm to 5.0 mm. For the hatching scanning strategy, the surface roughness drastically reduces by similar to 51% as the diameter increases. This appears to be the coupling results of heat accumulation, molten pool morphology at the end of single-track, overlap between multi-tracks within a layer, and successive rotational buildup between layers. Moreover, decreasing the diameter substantially reduces the tensile strength. Fortunately, a hatching-contour scanning strategy is proposed to eliminate the scale effect of surface morphology and strength. These efforts provide essential guidance for the broader application of multi-scaled structures.

引用

页数：21

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