| Title |
The Influence of Addition Elements and Two - step Aging Treatment on the Formability of Al-Mg-Si Alloys used for Auto Body Materials |
| Authors |
우기도(Kee Do Woo),황인오(In O Hwang),이종수(Jong Soo Lee) |
| Abstract |
The purpose of this study is to develop an Al-0.8%Mg-1.0%Si alloy that combined bake hardenability and formability. A differential scanning calorimeter, transmission electron microscope, tensile test and Erichsen test were employed to investigate bake hardenability and formability of Al-Mg-Si alloys. A new Cr and Be addition Al-Mg-Si alloy which combined bake hardenability and formability has been developed. The bake hardenability and formability of Al-0.8%Mg-1.0%Si was improved by the two step aging treatment(120℃/4hrs→180℃/0.5hrs), and by the complex addition of the 0.1%Cr and 0.057%Be elements. Erichsen value of Al-Mg-Si-Cr-Be alloy is similar to that of Al-Mg-Si alloys, but the strength of Al-Mg-Si-Cr-Be alloy is higher than that of Al-Mg-Si alloys in two step aging treatment(120℃/4hrs→180℃/0.5hrs). |