Stress Corrosion Cracking Behavior of Peened Friction Stir Welded 2195 Aluminum Alloy Joints

The surface treatment techniques of laser and shot peening were used to investigate their effect on stress corrosion cracking (SCC) in friction stir welded (FSW) 2195 aluminum alloy joints. The investigation consisted of two parts: the first part explored the peening effects on slow strain rate testing (SSRT) in a 3.5% NaCl solution, while the second part investigated the effects of peening on corrosion while submerged in a 3.5% NaCl solution with no external loads applied. For the SSRT, the laser-peened samples demonstrated superior properties to the other samples, but no signs of corrosion pitting or SCC were evident on any of the samples. For the second part of the study, the FSW plates were inspected periodically for signs of corrosion. After 60 days there were signs of corrosion pitting, but no stress corrosion cracking was noticed in any of the peened and unpeened samples.

[1]  W. M. Thomas,et al.  Friction Stir Butt Welding , 1991 .

[2]  Pickens,et al.  DURING AGING OF AN AI-Cu-Li-Ag-Mg-Zr ALLOY , 2022 .

[3]  E. Meletis,et al.  Corrosion and Environment-Assisted Cracking Behavior of Friction Stir Welded Al 2195 and Al 2219 Alloys , 2000 .

[4]  Jin-feng Li,et al.  Corrosion behavior of 2195 and 1420 Al-Li alloys in neutral 3.5% NaCl solution under tensile stress , 2006 .

[5]  C. Dalle Donne,et al.  Investigations on Residual Stresses in Friction Stir Welds , 2001 .

[6]  P. Niskanen,et al.  Corrosion of aluminum alloys containing lithium , 1982 .

[7]  M. Koçak,et al.  Residual stress in friction stir-welded Al sheets , 2004 .

[8]  M. Preuss,et al.  Microstructure, mechanical properties and residual stresses as a function of welding speed in aluminium AA5083 friction stir welds , 2003 .

[9]  R. Fabbro,et al.  Laser shock processing of aluminium alloys. Application to high cycle fatigue behaviour , 1996 .

[10]  C. Donne,et al.  Fatigue crack propagation assessment based on residual stresses obtained through cut-compliance technique , 2007 .

[11]  G. Oertelt,et al.  Effect of Thermal Cycling on Friction Stir Welds of 2195 Aluminum Alloy , 2001 .

[12]  Yang-ming Chang,et al.  Residual stress measurement by X-ray diffraction , 1972 .

[13]  Y. Mai,et al.  Laser shock processing and its effects on microstructure and properties of metal alloys: a review , 2002 .

[14]  O. Hatamleh.  Surface hardness changes in laser peened Friction Stir Welded 2195 and 7075 Aluminum Alloys , 2008 .

[15]  Rajiv S. Mishra,et al.  Friction Stir Welding and Processing , 2007 .

[16]  P. Cavaliere.  Effect of friction stir processing on the fatigue properties of a Zr-modified 2014 aluminium alloy , 2006 .

[17]  H. Kroninger,et al.  R-curve behaviour of friction stir welds in aluminium-lithium alloy 2195 , 2002 .

[18]  Philip J. Withers,et al.  Effects of fatigue and fretting on residual stresses introduced by laser shock peening , 2006 .

[19]  Michael A. Sutton,et al.  A Study of Residual Stresses and Microstructure in 2024-T3 Aluminum Friction Stir Butt Welds , 2002 .