Microstructural and Mechanical Evolutions within Friction Stir Welds of Precipitation Hardened Aluminium Alloys

Denquin, Anne; Allehaux, D.; Campagnac, M.H.; Lapasset, G.

doi:10.4028/www.scientific.net/msf.426-432.2921

Cited by 13 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The grain structure in the HAZ of the S66 weld (Fig. 7a) is similar to that of the unaffected base material and no hardness decrease was observed in this zone, such as reported by several authors for other alloys of the 6xxx series [3,19,26,31,32]. This can be attributable to the low heat input during the weld process.…”

Section: Hardness Test Resultssupporting

confidence: 50%

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

et al. 2009

View full text Add to dashboard Cite

a b s t r a c tThe tensile behaviour of similar and dissimilar friction stir welds in 1 mm thick sheets of two aluminium alloys (AA5182-H111 and AA6016-T4) is analysed in this paper. The heterogeneity in properties across the welds was studied by performing microhardness tests and microstructural analysis. The tensile tests were performed in samples extracted longitudinal and transverse to the weld direction. It was found that the tensile behaviour of the welds depends mainly on the grain size in the TMAZ, for the AA5182-H111 alloy, and on precipitate distribution, for the AA6016-T4 alloy. In all types of welds, the HAZ preserves the same properties of the base materials. The global mechanical behaviour of the AA5182-H111 similar welds is very similar to that of the base material. However, for the AA6016-T4 similar welds and for the AA6016-T4-AA5182-H111 dissimilar welds a 10-20% strength reduction relative to the base materials and important losses in ductility were reported.

show abstract

Section: Hardness Test Resultssupporting

confidence: 50%

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

et al. 2009

View full text Add to dashboard Cite

show abstract

“…As in friction stir welds of other age-hardened aluminum alloys, [4,[6][7][8]10,[36][37][38] the microhardness in this weld decreases from the baseplate toward the weld, forms a band of minimum microhardness extending upward and outward from the base of the weld, then begins to increase toward the center of the weld. This behavior has been proposed [2][3][4][5][6][7][8][9][10][36][37][38] to correspond to overaging induced by the heat of welding. However, this friction stir weld exhibits a unique feature toward the weld center.…”

Section: A Macrostructure and Microhardnessmentioning

confidence: 99%

Precipitation and grain refinement in a 2195 Al friction stir weld

Fonda

Bingert

2006

Metall Mater Trans A

132

View full text Add to dashboard Cite

The microstructure across a friction stir weld in aluminum alloy 2195 was analyzed to reveal the precipitation processes, grain evolution mechanisms, and crystallographic texture within that weld. The complex microhardness variations across the weld are explained by the observed precipitation sequence, in which the original precipitates coarsen and dissolve during welding, and are then replaced by different precipitates, which form during cooling. The grain development from the thermomechanically affected zone (TMAZ) into the weld nugget reveals that subgrains form within the TMAZ grains and develop increasing boundary misorientations through continuous dynamic recrystallization by subgrain rotation to eventually form the refined grains observed within the weld nugget. Within the weld nugget, a {112},110. texture is observed, corresponding to a high strain/high temperature shear strain component.

show abstract

“…Since its invention in 1991 by TWI (Cambridge, United Kingdom) [1], friction stir welding (FSW) has emerged as a reliable method to join high strength 7XXX series Al alloys [2][3][4][5][6][7][8][9][10][11][12]. The high strength aerospace Al alloys, namely 7050 and 7075, are considered "unweldable" by fusion techniques due to solidification cracking or severely degraded mechanical properties within the joint [13,14].…”

Section: Introductionmentioning

confidence: 99%

Evolution of microstructure and mechanical properties in naturally aged 7050 and 7075 Al friction stir welds

Fuller

Mahoney

Calabrese

et al. 2010

Materials Science and Engineering: A

255

View full text Add to dashboard Cite

Microstructural and Mechanical Evolutions within Friction Stir Welds of Precipitation Hardened Aluminium Alloys

Cited by 13 publications

References 0 publications

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

Mechanical behaviour of similar and dissimilar AA5182-H111 and AA6016-T4 thin friction stir welds

Precipitation and grain refinement in a 2195 Al friction stir weld

Evolution of microstructure and mechanical properties in naturally aged 7050 and 7075 Al friction stir welds

Contact Info

Product

Resources

About