Low-cycle fatigue characteristics and fracture behavior of the die-forged 2014 aircraft wheel
Zhengjun Shen
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorLiuli Yang
School of Materials Science and Engineering, Hunan University, Changsha, China
Search for more papers by this authorJichang Deng
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorYinyin Zhu
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorCorresponding Author
Yuchang Su
School of Materials Science and Engineering, Central South University, Changsha, China
Correspondence
Yuchang Su, School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Email: [email protected]
Search for more papers by this authorZhengjun Shen
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorLiuli Yang
School of Materials Science and Engineering, Hunan University, Changsha, China
Search for more papers by this authorJichang Deng
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorYinyin Zhu
School of Materials Science and Engineering, Central South University, Changsha, China
Search for more papers by this authorCorresponding Author
Yuchang Su
School of Materials Science and Engineering, Central South University, Changsha, China
Correspondence
Yuchang Su, School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Email: [email protected]
Search for more papers by this authorFunding information: National Key Laboratory Basic Research and Development Program of China, Grant/Award Number: 411590002; Hunan Science and Technology Major Project, Grant/Award Number: 2021GK1031
Abstract
In order to provide a sufficient theoretical basis for the fatigue-resistant design of the aircraft wheels, strain-controlled low-cycle fatigue (LCF) tests were carried out on specimens machined in the extrusion direction (ED) and transverse direction (TD) of die-forged 2014 aluminum alloy wheels. Although the TD specimens have lower tensile strength and yield strength, the fatigue test results show that the TD specimens have superior fatigue life compared with the ED specimens at total strain amplitudes of 0.5–0.8%. This is predominantly caused by the coarse Al12(MnSi)2(FeCu) intermetallic particles close to the surface layer, which results in a relatively short crack initiation stage for the ED specimens. In contrast, TD specimens with finer and more uniform recrystallized grains exhibit more excellent resistance to fatigue crack initiation (FCI) and propagation (FCP). Moreover, the fatigue life of alloys could be accurately predicted via a Manson–Coffin–Basquin (MCB) model based on total strain.
CONFLICTS OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Open Research
DATA AVAILABILITY STATEMENT
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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