Effect of aging treatment on microstructure and corrosion properties of Al-Cu-Mn-Si-Mg-Er-Zr alloy

被引：0

作者：

Ma, Chenxi ^{[1
]}

Rong, Li ^{[1
]}

Wei, Wu ^{[1
]}

Chen, Jiongshen ^{[1
]}

Wang, Meng ^{[2
]}

Wang, Zezhong ^{[3
]}

Zhou, Li ^{[3
]}

Wang, Xiaobo ^{[1
]}

Zheng, Zhihao ^{[1
]}

Huang, Hui ^{[1
]}

机构：

[1] Beijing Univ Technol, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

[2] Xian Aerosp Power Machinery Corp, Xian 710025, Peoples R China

[3] Dongfeng Motor Corp, Wuhan 430056, Peoples R China

来源：

ENGINEERING RESEARCH EXPRESS | 2024年 / 6卷 / 03期

关键词：

heterogeneous nucleation; intergranular corrosion; peak aging; the width of the PFZ; MECHANICAL-PROPERTIES; STRESS-CORROSION; ALUMINUM-ALLOYS; RESISTANCE; SC; FRACTURE; PRECIPITATION; TEMPERATURE; BEHAVIOR; CRACKING;

D O I：

10.1088/2631-8695/ad5cd0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure, mechanical properties and intergranular corrosion resistance of Al-Cu-Mn-Si-Mg-Er-Zr alloy with squeeze casting in the peak aging state at different temperatures were studied. The alloy was aged at 165 degrees C, 175 degrees C and 185 degrees C, and reached peak aging at 18 h, 12 h and 8 h respectively, among them, the alloy treated with 175 degrees C/12 h aging has the highest hardness, reaching 149 HV, and the yield strength is also the highest, which is 387 MPa. It is because the Q phase precipitated during the aging process of the alloy provides a heterogeneous nucleation site for the theta ' phase, the average size of the theta ' phase is 73.38 nm. The intergranular corrosion depth of the alloy after aging treatment at 175 degrees C/12 h was the deepest, reaching 284.91 mu m. At this time, the width of precipitation-free zone(PFZ) is the widest in the grain boundary microstructure, which is 92.21 nm, and the grain boundary precipitation phase is continuously distributed.

引用

页数：8

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