A novel surface strengthening technique for enhancing fatigue properties of 6061 Al alloy
Creators
- 1. Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
- 2. Chinese Acad Sci, Shenyang Inst Automation, Shenyang 110000, Peoples R China
- 3. Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkiye
- 4. Recep Tayyip Erdogan Univ, Dept Mech Engn, TR-53100 Rize, Turkiye
Description
A new surface spinning rolling (SR) strengthening technique was developed to enhance the fatigue properties of 6061 Al alloy. The traditional shot peening (SP) process can strengthen the sample's surface, but it increases surface damage, which seriously hinders the improvement of fatigue performance. However, the SR process not only introduces a high residual compressive stress and a hardened layer on the sample surface but also remarkably lowers the surface roughness. Moreover, the SR treatment formed a gradient microstructure on the surface layer of 6061 Al alloy, effectively postponing the initiation and propagation of fatigue cracks. Fatigue experiments demonstrate that after SR treatment, the fatigue strength of 6061 Al alloy increases by 17.9 %, from 223 MPa to 263 MPa. This study demonstrates the significant advantages by the SR process in producing high fatigue-resistant Al alloy components.
Files
bib-df648303-33c3-4ba0-8ca9-afb8ea2b022d.txt
Files
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