Open AccessVHCF Properties of A7075-T651 Al Alloy Depending on Shot Peening and Fatigue Testing Methods
Author(s) -
MinSoo Suh,
Chang Hee Suh,
Seung Hoon Nahm,
ChangMin Suh
Publication year - 2014
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1155/2014/126848
Subject(s) - shot peening , materials science , peening , fatigue limit , residual stress , bending , fatigue testing , structural engineering , composite material , engineering
Fatigue characteristics of A7075-T651 aluminum material were studied with surface treatment of shot peening. The fatigue life was characterized by two fatigue testing methods, ultrasonic fatigue test (UFT, 20 kHz) and the rotary-bending fatigue test (RFT, 53 Hz). The fatigue life improvement was confirmed by rotary bending fatigue tester. However, the surface modification effects were hardly observed by UFT method. The RFT results validate that the fatigue properties of RFT show a fine congruence regardless of the test machine types. The results of hardness, compressive residual stress, fatigue strength, and mechanical properties of specimen were improved by shot peening