A practical analysis of residual stresses induced by high-frequency mechanical impact post-weld treatment

2019 ◽  
Vol 63 (5) ◽  
pp. 1255-1263 ◽  
Author(s):  
Hector Ruiz ◽  
Naoki Osawa ◽  
Sherif Rashed
Keyword(s):  
Residual Stresses ◽  
High Frequency ◽  
Mechanical Impact ◽  
Practical Analysis

Behavior of Compressive Residual Stresses in High Strength Steel Welds Induced by High Frequency Mechanical Impact Treatment

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Mansoor Khurshid ◽  
Zuheir Barsoum ◽  
Gary Marquis
Keyword(s):  
Residual Stresses ◽  
Welded Joints ◽  
High Frequency ◽  
Fatigue Testing ◽  
Research Work ◽  
High Strength ◽  
Fatigue Loading ◽  
Element Analysis ◽  
Mechanical Impact ◽  
Compressive Residual Stresses

Residual stress state plays an important role in the fatigue life of welded structures. The effect can be beneficial or detrimental, depending on the nature of residual stresses. High frequency mechanical impact (HFMI) treatment is a postweld 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 nonload carrying attachments in HSS are tested with constant amplitude (CA) and variable amplitude (VA) fatigue loading. Stress concentration factors have been calculated using finite element analysis (FEA). 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.

Behavior of Compressive Residual Stresses in High Strength Steel Welds Induced by High Frequency Mechanical Impact Treatment

2013 ◽  
Author(s):  
Mansoor Khurshid ◽  
Zuheir Barsoum ◽  
Gary Marquis
Keyword(s):  
Residual Stresses ◽  
Welded Joints ◽  
High Frequency ◽  
Fatigue Testing ◽  
Research Work ◽  
High Strength Steels ◽  
High Strength ◽  
Element Analysis ◽  
Mechanical Impact ◽  
Compressive Residual Stresses

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 (FEA). 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.

scholarly journals Influence of the atmosphere corrosion on the fatigue life of welded T-joints treated by high frequency mechanical impact

2019 ◽  
Vol 16 ◽  
pp. 73-80 ◽  
Author(s):  
Vitalii Knysh ◽  
Sergii Solovei ◽  
Lyudmila Nyrkova ◽  
Illya Klochkov ◽  
Svіatoslav Motrunich
Keyword(s):  
Fatigue Life ◽  
High Frequency ◽  
T Joints ◽  
Mechanical Impact
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