Hot Cracking in Welds of Aluminum and Magnesium Alloys

Hot cracking in fusion and solid-state welding of aluminum alloys, magnesium alloys, and aluminum alloys to magnesium alloys is discussed. This includes: (1) liquation cracking in the partially melted zones of arc and resistance spot welds, (2) liquation cracking in the stir zones in friction stir welds, and (3) solidification cracking in the fusion zones of arc and resistance spot welds. Recent data of hot tearing (that is, solidification cracking during casting) in magnesium castings, which can be used to study solidification cracking in magnesium welds, are presented. These include the hot tearing susceptibility of new creep-resistant magnesium alloys and the test method used for evaluating the susceptibility.

[1]  S. Kou,et al.  Liquation Tendency and Liquid-Film Formation in Friction Stir Spot Welding , 2008 .

[2]  V. Firouzdor,et al.  Formation of Liquid and Intermetallics in Al-to-Mg Friction Stir Welding , 2010 .

[3]  S. Kou,et al.  Partially melted zone in aluminum welds -- Liquation mechanism and directional solidification , 2000 .

[4]  W. Zhou,et al.  Hot cracking in tungsten inert gas welding of magnesium alloy AZ91D , 2007 .

[5]  A. Gerlich,et al.  Peak temperatures and microstructures in aluminium and magnesium alloy friction stir spot welds , 2005 .

[6]  D. Sun,et al.  Microstructures and mechanical properties of resistance spot welded magnesium alloy joints , 2007 .

[7]  S. Kou,et al.  Hot-Tearing Susceptibility of Ternary Mg-Al-Sr Alloy Castings , 2010 .

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

[9]  Sindo Kou,et al.  Liquation of Mg Alloys in Friction Stir Spot Welding , 2008 .

[10]  R. Venkata Rao,et al.  A decision making methodology for material selection using an improved compromise ranking method , 2008 .

[11]  S. Kou,et al.  Liquation cracking in partial penetration aluminium welds: assessing tendencies to liquate, crack and backfill , 2004 .

[12]  K. S. Rao,et al.  Studies on partially melted zone in aluminium–copper alloy welds—effect of techniques and prior thermal temper , 2005 .

[13]  J. W. Park,et al.  Joining of nickel base superalloy single crystals , 1997 .

[14]  A. Gerlich,et al.  Local melting and cracking in Al 7075-T6 and Al 2024-T3 friction stir spot welds , 2007 .

[15]  S. Kou,et al.  Partially Melted Zone in Aluminum Welds — Planar and Cellular Solidification , 2001 .

[16]  K. Prasad Rao,et al.  Partially melted zone in Al–Mg–Si alloy gas tungsten arc welds: Effect of techniques and prior thermal temper , 2005 .

[17]  S. Kou,et al.  Liquation cracking in partial-penetration aluminum welds: Effect of penetration oscillation and backfilling , 2003 .

[18]  A. L. Greer,et al.  Particle break-up during heat treatment of 3000 series aluminium alloys , 2005 .

[19]  V. Firouzdor,et al.  Al-to-Mg Friction Stir Welding: Effect of Material Position, Travel Speed, and Rotation Speed , 2010 .

[20]  K. Shinozaki,et al.  Mechanism of cracking in AZ91 friction stir spot welds , 2007 .

[21]  D. Sun,et al.  Hot Cracking of Metal Inert Gas Arc Welded Magnesium Alloy AZ91D , 2009 .

[22]  K. P. Rao,et al.  Partially melted zone cracking in AA6061 welds , 2008 .

[23]  S. Kou,et al.  Partially melted zone in aluminum welds : Solute segregation and mechanical behavior , 2001 .

[24]  S. Kou.  Transport Phenomena And Materials Processing , 1996 .

[25]  G. Cao,et al.  Liquation Cracking in Aluminum Welds , 2007 .

[26]  S. Kou,et al.  Hot tearing of ternary Mg−Al−Ca alloy castings , 2006 .

[27]  Thomas Böllinghaus,et al.  Hot Cracking Phenomena in Welds III , 2005 .

[28]  B. Lang,et al.  Hot Cracking of Resistance Spot Welded Magnesium Alloy , 2008 .

[29]  M. K. Kulekci.  Magnesium and its alloys applications in automotive industry , 2008 .

[30]  S. Kou,et al.  Liquation mechanisms in multicomponent aluminum alloys during welding , 2002 .

[31]  T. Pollock,et al.  Solidification paths and eutectic intermetallic phases in Mg-Al-Ca ternary alloys , 2005 .

[32]  J. Senkara,et al.  Cracking in spot welding aluminum alloy AA5754 , 2000 .

[33]  S. Kou,et al.  Predicting and reducing liquation-cracking susceptibility based on temperature vs. fraction solid , 2006 .

[34]  S. Kou,et al.  Liquation cracking in full-penetration Al-Mg-Si welds , 2004 .

[35]  K. Shinozaki,et al.  Cracking in the stir zones of Mg-alloy friction stir spot welds , 2007 .

[36]  V. Firouzdor,et al.  Al-to-Mg Friction Stir Welding: Effect of Positions of Al and Mg with Respect to the Welding Tool , 2009 .