BEHAVIOR OF COMPRESSIVE RESIDUAL STRESSES IN HIGH STRENGTH STEEL WELDS INDUCED BY HIGH FREQUENCY MECHANICAL IMPACT TREATMENT

被引：0
|
作者：
Khurshid, Mansoor [1 ]
Barsoum, Zuheir [1 ]
Marquis, Gary [2 ]
机构：
[1] KTH Royal Inst Technol, Dept Aeronaut & Vehicle Engn, Div Lightweight Struct, S-10044 Stockholm, Sweden
[2] Aalto Univ, Dept Appl Mech, Aalto 00076, Finland
来源：
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE - 2013, VOL 5 | 2014年
关键词：
D O I：
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Residual stress state plays an important role in the fatigue life of welded structures. They can be beneficial or detrimental, depending on the nature of residual stresses. High frequency mechanical impact (HFMI) treatment is a post-weld fatigue improvement technique for welded joints. In this research work the behavior of compressive residual stresses induced in welded joints in high strength steels (HSS) by HFMI treatment has been investigated. Longitudinal non load carrying attachments in HSS are tested with constant amplitude (CA) and variable amplitude (VA) loading. Stress concentration factors have been calculated using Finite Element Analysis (PEA). Residual stresses have been measured at different cycles during fatigue testing using X-ray diffraction technique. It is observed that the induced residual stresses are quite stable with some relaxation in CA and VA loading. The overloads in VA loading seem to be more detrimental. Relaxation of residual stresses is more obvious in VA tests.
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页数：8
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