Effect of Aging on Impact Toughness and Fracture Behavior of Three Wrought Aluminum Alloys

被引:1
作者
Gong, BaiShan [1 ,2 ]
Zhang, ZhenJun [1 ,2 ]
Duan, QiQiang [1 ]
Hou, JiaPeng [1 ,2 ]
Li, RongHua [1 ,2 ]
Wang, XueGang [1 ]
Liu, HanZhong [1 ]
Cong, FuGuan [3 ]
Purcek, Gencay [4 ]
Zhang, ZheFeng [1 ,2 ]
机构
[1] Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Northeast Light Alloy Co Ltd, Sales Dept Aluminum Prod Mfg Plant, Harbin 150060, Peoples R China
[4] Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkiye
基金
中国国家自然科学基金;
关键词
aging state; deformation mechanism; grain boundary precipitated phase; impact toughness; plastic zone; precipitation-free zone; wrought Al alloy; PRECIPITATE-FREE ZONE; IN-SITU; PLANAR SLIP; STRENGTH; MICROSTRUCTURE; DEFORMATION; PARTICLES; RETROGRESSION; RESISTANCE; TENSILE;
D O I
10.1002/adem.202300033
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Herein, the effect of the aging state on the impact toughness of three typical wrought Al alloys (7075, 2024, and 6A01) is investigated. At room temperature, the fracture mode of the three aluminum alloys at different aging states is a ductile transgranular fracture. At low temperatures, high-strength aluminum alloys exhibit a mixture fracture of transgranular and intergranular, while medium-strength aluminum alloys are still dominated by transgranular fractures. The effect of the aging state on the impact toughness of aluminum alloys was analyzed based on the deformation mechanism and morphology near grain boundaries. The underaged state with planar slip dislocations exhibits good plasticity and work-hardening ability, which reduces the strain localization caused by dislocation plugging and thus improves the impact toughness of the alloy. Furthermore, the fine grain boundary precipitates and the narrow precipitation-free zone of the underaged increase the uniform deformation capacity near the grain boundaries and inhibit the initiation and propagation of cracks. Compared with high-strength aluminum alloys, medium-strength aluminum alloys exhibit higher impact toughness due to the formation of a larger plastic zone and shear lip area during impact.
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页数:13
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