Elimination of extraordinarily high cracking susceptibility of ZK60 Mg alloy fabricated by laser powder bed fusion

Jingwei Liang; Zhenglong Lei; Yanbin Chen; Weijie Fu; Xi Chen; Shengchong Ma

doi:10.1016/j.matlet.2022.131731

Elimination of extraordinarily high cracking susceptibility of ZK60 Mg alloy fabricated by laser powder bed fusion

Jingwei Liang
, Zhenglong Lei^*
, Yanbin Chen
, Weijie Fu
, Xi Chen
, Shengchong Ma

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The hot cracks of laser powder bed fusion (LPBF) processed ZK60 components were eliminated by adding rare earth element Y. The cause of the cracks in the samples and the suppression mechanism were analyzed in detail. The cracks in ZK60 LPBF samples were mainly caused by the low-melting eutectic phase Mg₇Zn₃ at the grain boundaries. The average grain size decreased from 7.2 μm to 2.0 μm after adding Y. The I-phase with excellent thermal stability strengthened the grain boundaries. The elimination of cracks was mainly attributed to the I-phase at the grain boundary and the grain refinement.

Original language	English
Article number	131731
Journal	Materials Letters
Volume	312
DOIs	https://doi.org/10.1016/j.matlet.2022.131731
State	Published - 1 Apr 2022

Keywords

Additive manufacturing
Hot crack
Laser processing
Magnesium alloy
Microstructure

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10.1016/j.matlet.2022.131731

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title = "Elimination of extraordinarily high cracking susceptibility of ZK60 Mg alloy fabricated by laser powder bed fusion",

abstract = "The hot cracks of laser powder bed fusion (LPBF) processed ZK60 components were eliminated by adding rare earth element Y. The cause of the cracks in the samples and the suppression mechanism were analyzed in detail. The cracks in ZK60 LPBF samples were mainly caused by the low-melting eutectic phase Mg7Zn3 at the grain boundaries. The average grain size decreased from 7.2 μm to 2.0 μm after adding Y. The I-phase with excellent thermal stability strengthened the grain boundaries. The elimination of cracks was mainly attributed to the I-phase at the grain boundary and the grain refinement.",

keywords = "Additive manufacturing, Hot crack, Laser processing, Magnesium alloy, Microstructure",

author = "Jingwei Liang and Zhenglong Lei and Yanbin Chen and Weijie Fu and Xi Chen and Shengchong Ma",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = apr,

day = "1",

doi = "10.1016/j.matlet.2022.131731",

language = "英语",

volume = "312",

journal = "Materials Letters",

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T1 - Elimination of extraordinarily high cracking susceptibility of ZK60 Mg alloy fabricated by laser powder bed fusion

AU - Liang, Jingwei

AU - Lei, Zhenglong

AU - Chen, Yanbin

AU - Fu, Weijie

AU - Chen, Xi

AU - Ma, Shengchong

PY - 2022/4/1

Y1 - 2022/4/1

N2 - The hot cracks of laser powder bed fusion (LPBF) processed ZK60 components were eliminated by adding rare earth element Y. The cause of the cracks in the samples and the suppression mechanism were analyzed in detail. The cracks in ZK60 LPBF samples were mainly caused by the low-melting eutectic phase Mg7Zn3 at the grain boundaries. The average grain size decreased from 7.2 μm to 2.0 μm after adding Y. The I-phase with excellent thermal stability strengthened the grain boundaries. The elimination of cracks was mainly attributed to the I-phase at the grain boundary and the grain refinement.

AB - The hot cracks of laser powder bed fusion (LPBF) processed ZK60 components were eliminated by adding rare earth element Y. The cause of the cracks in the samples and the suppression mechanism were analyzed in detail. The cracks in ZK60 LPBF samples were mainly caused by the low-melting eutectic phase Mg7Zn3 at the grain boundaries. The average grain size decreased from 7.2 μm to 2.0 μm after adding Y. The I-phase with excellent thermal stability strengthened the grain boundaries. The elimination of cracks was mainly attributed to the I-phase at the grain boundary and the grain refinement.

KW - Additive manufacturing

KW - Hot crack

KW - Laser processing

KW - Magnesium alloy

KW - Microstructure

UR - https://www.scopus.com/pages/publications/85123032696

U2 - 10.1016/j.matlet.2022.131731

DO - 10.1016/j.matlet.2022.131731

M3 - 文章

AN - SCOPUS:85123032696

SN - 0167-577X

VL - 312

JO - Materials Letters

JF - Materials Letters

M1 - 131731

ER -

Elimination of extraordinarily high cracking susceptibility of ZK60 Mg alloy fabricated by laser powder bed fusion

Abstract

Keywords

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