Fatigue limit investigation of 6061-T6 aluminum alloy in giga-cycle regime

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 614; pp. 243 - 249
• Main Authors: Takahashi, Yoshimasa, Yoshitake, Hiroaki, Nakamichi, Ryota, Wada, Takuya, Takuma, Masanori, Shikama, Takahiro, Noguchi, Hiroshi
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 22.09.2014; Elsevier
• Subjects: Aluminum alloys; Aluminum base alloys; Applied sciences; Cracks; Cross-disciplinary physics: materials science; rheology; Cyclic slip; EBSD; Elasticity. Plasticity; Electron back scatter diffraction; Emergence; Exact sciences and technology; Fatigue; Fatigue (materials); Fatigue failure; Fatigue limit; FIB; Fractures; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metallurgy; Metals. Metallurgy; Physics; Solid solution, precipitation, and dispersion hardening; aging; Treatment of materials and its effects on microstructure and properties; Very-high-cycle fatigue; Aluminum alloys; Cyclic slip; Fatigue limit; Very-high-cycle fatigue; EBSD; FIB; Fatigue life; High cycle fatigue; Slip; Metallography; Precipitation hardening; Focused ion beam technology; Surface states; Crack propagation; Replica techniques; Plasticity; Slip band; Stress effects; Smooth surface; Rotating beam fatigue test; Fatigue cracks; Ultrasonic method

In order to investigate the fatigue limit micro-mechanism of a precipitation-hardened Al–Mg–Si alloy (6061-T6), the alloy was subjected to very-high-cycle fatigue (VHCF) of over 109 cycles by an ultrasonic fatigue method. Two kinds of specimens, one with smooth surface and the other with a small art...