TY - JOUR
T1 - Evolution of microstructure and mechanical properties of a dissimilar aluminium alloy weldment
AU - Wang, X.
AU - Mao, S.
AU - Chen, P.
AU - Liu, Yinong
AU - Ning, J.
AU - Li, H.
AU - Zang, K.
AU - Zhang, Z.
AU - Han, X.
PY - 2016
Y1 - 2016
N2 - © 2015 Elsevier Ltd. This paper reports a study on the effect of heat input on the microstructure and mechanical properties of dissimilar aluminium alloys joint by MIG welding. The two alloys used are 6N01S-T5 and 7N01P-T4. The 6N01S-T5 alloy exhibited two distinctive sub-zones within its heat affected zone, with the one adjacent to the unaffected parent alloy being the weakest during tensile deformation. The remarkable reduction in the mechanical properties in the weakest region is attributed to the transformation of the precipitates upon welding from smaller sized β″ and β' precipitates with strong strengthening effect to larger sized β precipitate. The 7N01P-T4 alloy exhibited nucleation of new grains, dissolution of precipitate, and loss of strength in the heat affect zone.
AB - © 2015 Elsevier Ltd. This paper reports a study on the effect of heat input on the microstructure and mechanical properties of dissimilar aluminium alloys joint by MIG welding. The two alloys used are 6N01S-T5 and 7N01P-T4. The 6N01S-T5 alloy exhibited two distinctive sub-zones within its heat affected zone, with the one adjacent to the unaffected parent alloy being the weakest during tensile deformation. The remarkable reduction in the mechanical properties in the weakest region is attributed to the transformation of the precipitates upon welding from smaller sized β″ and β' precipitates with strong strengthening effect to larger sized β precipitate. The 7N01P-T4 alloy exhibited nucleation of new grains, dissolution of precipitate, and loss of strength in the heat affect zone.
U2 - 10.1016/j.matdes.2015.10.134
DO - 10.1016/j.matdes.2015.10.134
M3 - Article
SN - 0264-1275
VL - 90
SP - 230
EP - 237
JO - Materials and Design
JF - Materials and Design
ER -