首页|Enhanced strength-ductility synergy of magnesium alloy fabricated by ultrasound assisted directed energy deposition

Enhanced strength-ductility synergy of magnesium alloy fabricated by ultrasound assisted directed energy deposition

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Investigations on the fabrication of large-size lightweight Mg alloy components by wire-arc directed en-ergy deposition(DED)are steadily flourishing.Nevertheless,most of these components still suffer from inferior performance due to internal defects and inherent columnar grains.Herein,external ultrasound fields with different powers were successfully introduced into the wire-arc DED of AZ31 Mg alloy.The microstructure,defects,and mechanical properties of the fabricated components were carefully charac-terized and compared.The results show that the external ultrasound fields lead to decreased porosity,complete columnar to equiaxed transition(CET),and enhanced performance.Consequently,the UA90 samples exhibited a remarkable increase of～30％,～45％,and～189％in yield strength,ultimate tensile strength,and elongation,respectively.The dominant mechanisms of enhanced strength-ductility synergy were analyzed in detail.This study thus sheds new light on wire-arc DED of Mg alloy components with excellent performance via external ultrasound fields.

Wire-arc directed energy depositionExternal ultrasound fieldDefectsMicrostructure evolutionStrength-ductility synergy

Xinzhi Li、Xuewei Fang、Mugong Zhang、Binglin Wang、Ke Huang

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State Key Laboratory for Manufacturing Systems Engineering,School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaXiaomi Foundation through the Xiaomi Young Scholar Program,the Key Research and Development Projects of Shaanxi ProvinceYoung Elite Scientists Sponsorship Program by CASTState Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Basic Research Funds for Freedom of Exploration and Innovation-Student Programs

52275374522054142023-YBGY-3612021QNRC00120212311xzy022023066

2024

10.1016/j.jmst.2023.09.021

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.178(11)
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