Low cycle fatigue life of the alloy IN718 enhanced through surface nanostructuring

Kumar, Sanjeev; Chattopadhyay, K.; Singh, Vakil; Satyanarayana, D.V.V.; Kumar, Vikas

dc.contributor.author	Kumar, Sanjeev
dc.contributor.author	Chattopadhyay, K.
dc.contributor.author	Singh, Vakil
dc.contributor.author	Satyanarayana, D.V.V.
dc.contributor.author	Kumar, Vikas
dc.date.accessioned	2020-02-03T10:50:02Z
dc.date.available	2020-02-03T10:50:02Z
dc.date.issued	2020-01
dc.identifier.issn	10445803
dc.identifier.uri	http://localhost:8080/xmlui/handle/123456789/603
dc.description.abstract	Surface nanostructure was developed on the peak aged IN718 superalloy using surface mechanical attrition treatment (SMAT) and its influence was studied on low cycle fatigue (LCF) behaviour. The gauge section of LCF samples was SMATed with steel balls of 3 mm for the duration of 5 min at constant frequency of 20 kHz using StressVoyager to modify the surface. Surface grains of 36 μm were refined to ~49 to 73 nm following SMAT. Strain controlled cyclic tests were performed for the non-SMATed and SMATed samples at ±Δεt/2 from ±0.50% to ±1.0% at strain rate (ė) 1 × 10−3 s−1 under reversed loading (R = –1) at room temperature. LCF life of the SMATed specimen at Δεt/2 = ±0.50%, was enhanced by more than twice that of the non-SMATed specimen.	en_US
dc.description.sponsorship	Science and Engineering Research Board (SERB), India	en_US
dc.language.iso	en_US	en_US
dc.publisher	Elsevier Inc.	en_US
dc.subject	IN718 alloy	en_US
dc.subject	LCF life	en_US
dc.subject	Nanostructure	en_US
dc.subject	Surface mechanical attrition treatment	en_US
dc.title	Low cycle fatigue life of the alloy IN718 enhanced through surface nanostructuring	en_US
dc.type	Article	en_US