Microstructure, cracking behavior and control of Al-Fe-V-Si alloy produced by selective laser melting

被引：19

作者：

Sun, Shao-Bo ^{[1
]}

Zheng, Li-Jing ^{[1
]}

Liu, Jin-Hui ^{[2
]}

Zhang, Hu ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Heilongjiang Inst Sci & Technol, Modern Mfg Engn Ctr, Harbin 150027, Peoples R China

来源：

RARE METALS | 2023年 / 42卷 / 04期

关键词：

Al-Fe-V-Si alloy; Selective laser melting; Microstructure; Cracking behavior; Mechanical properties; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; HOT-CRACKING; TEMPERATURE; STRESS;

D O I：

10.1007/s12598-016-0846-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Selective laser melting (SLM) technology based on atomized powder was used to fabricate Al-8.5Fe-1.3V-1.7Si (wt%) alloy parts. The microstructure and crack characterization of SLM samples fabricated at various conditions were presented. Results show that the cracks appear periodically along the building direction, initiate preferably at the outer edges of the as-built samples and propagated along the remelting border zone (RBZ) into deposited layers. Solid-phase cracking is proposed according to the fracture morphology. The thermal-induced residual stress during SLM combined with the precipitation of relatively large-sized AlmFe phase in the RBZ results in the formation of cracks. Enhancing scanning speed and hatch distance enable to reduce the cracking sensitivity. The crack-free Al-8.5Fe-1.3V-1.7Si parts can be fabricated at optimized parameters of laser power of 320 W, scanning speed of 1000 mm center dot s(-1) and hatch distance of 0.10 mm along with proper laser pre-heating procedure. The samples built horizontally show good ultimate tensile properties of 454 MPa in average with the elongation of 7.2%.

引用

页码：1353 / 1362

页数：10

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