|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Improving Bendability of Al-Mg-Si Alloy Sheet by Minor Alloying Element Addition
||Sazol Das, Matthew Heyen, Rajeev Kamat, Richard Hamerton
|On-Site Speaker (Planned)
AA6XXX series Al-Mg-Si alloys are preferred for outer applications in vehicles due to the good strength and forming capability which they offer. Successful use of aluminum in such applications depends on a very clear understanding of the underlying physical metallurgy gained by studying the formability and its relationship with microstructure in greater detail. Lower temperature, longer homogenization is more effective to produce a large quantity of fine dispersoids, whereas higher temperature homogenization tends to coarsen dispersoids. A large number density of dispersoids improves the material’s bendability, even with a higher Fe content, believed to be due to promotion of more diffuse slip and crack blunting. Increase in Mn and Cr also encourages transformation of AlFeSi (as-cast plate-like) constituents to Al(Fe,Mn/Cr)Si (more spheroidal) constituents during homogenization. Spheroidal constituent particles are less likely to lead to crack initiation in materials subject to deformation and thus help to improve bendability.
||Planned: Light Metals