Tensile Fracture Behavior of 2A14 Aluminum Alloy Produced by Extrusion Process
Yunpeng Meng,
Hua Zhang,
Xia Li,
Xin Zhou,
Huajun Mo,
Lifei Wang,
Jianfeng Fan
Affiliations
Yunpeng Meng
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Hua Zhang
Institute for Advanced Studies in Precision Materials, Yantai University, Yantai 264005, China
Xia Li
College of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China
Xin Zhou
Institute for Advanced Studies in Precision Materials, Yantai University, Yantai 264005, China
Huajun Mo
The First Sub-Institute, Nuclear Power Institute of China, Chengdu 610005, China
Lifei Wang
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Jianfeng Fan
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
In this study, the tensile mechanical properties of a 2A14 aluminum alloy produced by extrusion were tested at room temperature to investigate the tensile fracture behavior. The results showed that the tensile fracture of the alloy was mixed intergranular and transgranular ductile fracture, as numerous coarse second-phase particles were distributed in a band along the loading direction, making it prone to microcracking. This was determined to be the main cause of fracture failure of the alloy. In addition, we observed large α-AlFeMnSi(Cu), Al(Fe,Mn)Cu, AlCuMgSi, and Al2Cu phases in the microstructure of the 2A14 aluminum alloy, and both Al2Cu second phase and precipitation-free phase zone (PFZ) at the grain boundaries were observed, which made the alloy susceptible to fracture failure and reduced the mechanical properties of the alloy.
