Evaluation of an Ultrasound-Aided Deep Rolling Process for Anti-Fatigue Applications |
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Authors: | You-Li Zhu Kan Wang Li Li Yuan-Lin Huang |
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Affiliation: | (1) Faculty of Remanufacturing Engineering, Academy of Armored Force Engineering, No. 21 Dujiakan Changxindian, Beijing, 100072, China |
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Abstract: | An ultrasound-aided deep rolling process (UADR) for anti-fatigue applications was developed and used for surface enhancement
of titanium alloy specimens. The rotating bending fatigue test was performed for the UADR-treated and untreated fatigue specimens.
Fractography of the fatigue-fractured specimens was investigated via scanning electronic microscopy (SEM). Surface and subsurface
residual stress distributions after UADR treatment were measured by X-ray diffraction method. Surface morphology and roughness
were observed and measured via SEM micrograph and a Talysurf roughness tester, respectively. The results showed that a deep
layer of residual compressive stress developed and surface roughness was reduced after UADR treatment. Fatigue strength of
the titanium alloy specimens was substantially improved. The fractographic examination of the fatigue-fractured specimens
showed that the UADR-treated specimens developed finer fatigue striations than the untreated specimen. |
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