Ultrasonic fatigue performance of high temperature structural material Inconel 718 alloys at high temperature after UNSM treatment
Auezhan AmanovDepartment of Mechanical Engineering Sun Moon University Chungnam 336‐708 South KoreaYoung Sik PyunDepartment of Mechanical Engineering Sun Moon University Chungnam 336‐708 South KoreaJi Hoon KimDepartment of Mechanical Engineering Sun Moon University Chungnam 336‐708 South KoreaC.‐M. SuhSchool of Mechanical Engineering Kyungpook National University Daegu 702‐701 South KoreaIn-Sik ChoH.‐D. KimDepartment of Mechanical Engineering Sun Moon University Chungnam 336‐708 South KoreaQingyuan WangDepartment of Civil Engineering and Mechanics Sichuan University Chengdu 610065 ChinaMuhammad Kashif KhanDepartment of Mechanics and Engineering Science Sichuan University Chengdu 610065 China
2015en
ABI
Аннотация
Abstract This study investigates the influence of ultrasonic nanocrystal surface modification (UNSM) technique on the mechanical characteristics and fatigue life of two types of annealed and aged Inconel 718 alloys. The mechanical properties of both UNSM‐treated alloys were compared with the untreated specimens. The fatigue life of the untreated and UNSM‐treated Inconel 718 alloy specimens was investigated by ultrasonic fatigue and rotary‐bending fatigue tests. Results revealed that the UNSM‐treated specimens exhibited longer fatigue life than those of the untreated specimens. The improvement in fatigue life is mainly attributed to the induced compressive residual stress induced in the subsurface by UNSM technique.
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