The Effects of Ultrasound-Aided Deep Rolling Process on Fatigue Enhancement of 30CrMnSiNi2A Steel

Author:  J.F. Xie, Y.L. Zhu, Y.L. Huang
Source:  Conf Proc 2011: ICSP-11 South Bend, IN USA (pgs. 61-66)
Doc ID:  2011010
Year of Publication:  2011
Abstract:  
Abstract The effect of ultrasound-aided deep rolling (UADR) treatment on the fatigue resistance of 30CrMnSiNi2A steel was studied through fatigue experiments. Residual stress and full width at half maximum (FWHM) were measured by XRD, In-depth hardness profile of the treated specimen was measured with a Vickers micro-hardness tester. Surface finishing and roughness were observed and measured by optical micrograph and a Talysurf roughness tester, respectively. Fractography of the fatigue fractured specimens was evaluated via scanning electron microscope(SEM). It was shown that the UADR process obviously enhanced the fatigue resistance of 30CrMnSiNi2A steel as a results of induced deeper layer of compressive stress, improved surface integrity and refined microstructure. Meanwhile, it was interesting to note that the FWHM value of the top surface layer was decreased due to UADR treatment, which implies that the FWHM value may not be used as the character parameter representing the degree of work hardening of the 30CrMnSiNi2A steel. Keywords: UADR process, residual stress, fatigue resistance, 30CrMnSiNi2A Steel