Effect of Melt Hydrogen Content on Hot Tearing Behavior of Al-Cu Alloys

doi:10.12442/j.issn.1002-185X.20220907

Home > Archive>Volume 52, Issue 6, 2023 >2039-2047. DOI:10.12442/j.issn.1002-185X.20220907

Effect of Melt Hydrogen Content on Hot Tearing Behavior of Al-Cu Alloys
DOI:
                        10.12442/j.issn.1002-185X.20220907
                    
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                        Gao Zhongtang1Gao Zhongtang
School of Mechanical Engineering, Xian University of Science and Technology, Xian 710054, China
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Yu Defeng1Yu Defeng
School of Mechanical Engineering, Xian University of Science and Technology, Xian 710054, China
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Gao Zhiming1Gao Zhiming
School of Mechanical Engineering, Xian University of Science and Technology, Xian 710054, China
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Lu Jiawei1Lu Jiawei
School of Mechanical Engineering, Xian University of Science and Technology, Xian 710054, China
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Yu Yuan2Yu Yuan
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Zhang Chuanwei1Zhang Chuanwei
School of Mechanical Engineering, Xian University of Science and Technology, Xian 710054, China
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Affiliation:1.School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;2.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Clc Number:
Fund Project:National Natural Science Foundation of China (51804251, 52104384); Science Fund of Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing (AMGM2021F04); Planning Project of Xi'an Science and Technology (21XJZZ0041); China Postdoctoral Science Foundation (2020M683675XB); NSF of Shaanxi Provincial Department of Education (21JK0761); Key Research and Development Program of Shaanxi (2023-YBGY-343)

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Abstract:

Al-Cu alloy with wide solidification interval is prone to hot tearing and porosity defects due to insufficient feeding. The effect of hydrogen content on the hot tearing susceptibility (HTS) of Al-xCu alloy was investigated by the constrained rod casting (CRC) mold. Based on analysis of the HTS value, fracture morphology and the microstructure of Al-xCu alloy with different hydrogen contents in the melt, the influence of porosity formation on the hot tearing was analyzed. The results show that the hot tearing susceptibility of the alloy is evidently aggravated, which is caused by grain coarsening and insufficient feeding of liquid phase in the late stage of solidification with the increase in melt hydrogen content. A porosity-based formation mechanism of hot tearing is proposed to explain the interplay between porosity and hot tearing.

Key words:Al-Cu alloy;hydrogen;hot tearing susceptibility;casting;porosity

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[Gao Zhongtang, Yu Defeng, Gao Zhiming, Lu Jiawei, Yu Yuan, Zhang Chuanwei. Effect of Melt Hydrogen Content on Hot Tearing Behavior of Al-Cu Alloys[J]. Rare Metal Materials and Engineering,2023,52(6):2039~2047.]
DOI：10.12442/j. issn.1002-185X.20220907

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Received:November 21,2022
Revised:May 24,2023
Adopted:March 15,2023
Online: July 03,2023
Published: June 30,2023

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