首页|Customized heat treatment process enabled excellent mechanical properties in wire arc additively manufactured Mg-RE-Zn-Zr alloys

Customized heat treatment process enabled excellent mechanical properties in wire arc additively manufactured Mg-RE-Zn-Zr alloys

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Customized heat treatment is essential for enhancing the mechanical properties of additively manufactured metallic materials,especially for alloys with complex phase constituents and heterogenous microstructure.However,the interrelated evolutions of different microstructure features make it difficult to establish optimal heat treatment processes.Herein,we proposed a method for customized heat treatment process exploration and establishment to overcome this challenge for such kind of alloys,and a wire arc additively manufactured(WAAM)Mg-Gd-Y-Zn-Zr alloy with layered heterostructure was used for feasibility verification.Through this method,the optimal microstructures(fine grain,controllable amount of long period stacking ordered(LPSO)structure and nano-scale β'precipitates)and the corresponding customized heat treatment processes(520 ℃/30 min+200 ℃/48 h)were obtained to achieve a good combination of a high strength of 364 MPa and a considerable elongation of 6.2％,which surpassed those of other state-of-the-art WAAM-processed Mg alloys.Furthermore,we evidenced that the favorable effect of the undeformed LPSO structures on the mechanical properties was emphasized only when the nano-scale β'precipitates were present.It is believed that the findings promote the application of magnesium alloy workpieces and help to establish customized heat treatment processes for additively manufactured materials.

wire arc additive manufacturingheat treatmentMg-RE-Zn-Zr alloysLPSO structuremechanical properties

Dong Ma、Chunjie Xu、Shang Sui、Yuanshen Qi、Can Guo、Zhongming Zhang、Jun Tian、Fanhong Zeng、Sergei Remennik、Dan Shechtman

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School of Materials Science and Engineering,Xi'an University of Technology,Xi'an,Shaanxi 710048,People's Republic of China

Xi'an Shechtman Nobel Prize New Materials Institute,Xi'an 710048,People's Republic of China

Xi'an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming,Xi'an,Shaanxi 710048,People's Republic of China

Department of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion,Guangdong Techn

MGM Nobel Prize New Materials Co.,Ltd,Tongchuan 727100,People's Republic of China

Department of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion,Guangdong Technion—Israel Institute of Technology,Shantou 515063,People's Republic of China

Department of Materials Science and Engineering,Technion-Israel Institute of Technology,Haifa 32000,Israel

Center for Nanoscience & Nanotechnology,Hebrew University of Jerusalem,Edmond J.Safra Campus,Jerusalem 91904,Israel

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Projects of Major Scientific and Technological Achievements Local Transformation of Xi'anInternational Science and Technology Cooperation Program of Shaanxi ProvinceProject of Qin Chuangyuan'Scientist+Engineer'team construction,Key R&D plan of Shaanxi ProvinceNational Natural Science Foundation of ChinaNatural Science Foundation of Guangdong ProvinceScientific Research Program Funded by Shaanxi Provincial Education DepartmentDoctoral Dissertations Innovation Fund of Xi'an University of TechnologyResearch Startup Project of Xi'an University of TechnologyNatural Science Foundation of Shaanxi ProvinceNatural Science Basic Research Program of Shaanxi

2022JH-ZDZH-00392023-GHZD-50S2023-YF-QCYK-0001-237521011342022A151501027522JK0479101-252072305101-2560822042023-JC-QN-05732023-JC-YB-412

2024

10.1088/2631-7990/ad48ea

极端制造(英文)

极端制造(英文)

CSTPCDEI
ISSN：
年,卷(期)：2024.6(4)
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