Low Cycle Fatigue behavior of AA7075 with surface gradient structure produced by Ultrasonic Shot Peening

Pandey, Vaibhav; Chattopadhyay, K.; Santhi Srinivas, N.C.; Singh, V.

dc.contributor.author	Pandey, Vaibhav
dc.contributor.author	Chattopadhyay, K.
dc.contributor.author	Santhi Srinivas, N.C.
dc.contributor.author	Singh, V.
dc.date.accessioned	2020-02-28T09:40:15Z
dc.date.available	2020-02-28T09:40:15Z
dc.date.issued	2016-06
dc.identifier.issn	24523216
dc.identifier.uri	http://localhost:8080/xmlui/handle/123456789/673
dc.description.abstract	Effect of ultrasonic shot peening (USSP) for different durations, with graded surface structures, was studied on low cycle fatigue behavior of the aluminium alloy 7075 (AA7075) at room temperature. LCF tests were conducted at different total strain amplitudes. Surface microstructures of the USSP treated specimens were characterized using X-ray diffraction and transmission-electron microscopy. No phase change was found due to USSP. Surface region of the ultrasonically shot peened sample was found to develop nanosize grains of 16-20 nm. Significant improvement was observed in LCF life of the specimen subjected to USSP for 180 seconds. However, LCF life of the sample USSPed for long duration of 300 seconds was reduced. The higher fatigue life resulting from USSP for 180 seconds, may be attributed to increased resistance of the USSPed sample against fatigue crack initiation, due to grain refinement in the surface region.	en_US
dc.language.iso	en_US	en_US
dc.publisher	Elsevier B.V.	en_US
dc.subject	Fractography	en_US
dc.subject	Grain refinement	en_US
dc.subject	Low Cycle Fatigue	en_US
dc.subject	Ultrasonic Shot Peening	en_US
dc.title	Low Cycle Fatigue behavior of AA7075 with surface gradient structure produced by Ultrasonic Shot Peening	en_US
dc.type	Working Paper	en_US