Affiliation:
1. Guangdong Xingfa Aluminium Group
2. Zheng Zhou Research Institute of CHALCO
3. Central South University
Abstract
microstructures, aging hardness, mechanical properties of Mg-9Gd-4Y-0.3Zr alloys were investigated. The microstructure is a typical dendritic structure of as-cast sample, The aging test of extruded samples were carried at a temperature rang of 200-300°C and at a different aging time. The aging peak hardness is about 120HV, tensile strength was tested at temperature 25°C, 200°C, 250°C and 300°C, tensile strengths are 375 Mpa, 364 Mpa, 329 Mpa, 286 Mpa respectively, the maximum elongation is 13.32% at 300°C. The fracture mode is mainly microvoid coalescence fracture combination the brittle cleavage fracture at room temperature, and microvoid coalescence fracture at 200-300°C.
Publisher
Trans Tech Publications, Ltd.
Reference6 articles.
1. Kentaro Yannada, Yoshiyuki Okubo, Masashi Shiono et al. Materials transactions. Vol. 47 (2006), p.1066.
2. J. Cízek, I. Prochǎzka, B. Smola. Materials Science forum. Vol. 482(2005), p.183.
3. Jakub Cizek, Ivan Prochazka, Bohumil Amola, Ivana Stulikova. Phys. Stat. Vol. 203(2006), p.466.
4. Bohumil smola, Ivana Stulífová, Jitka Pelcová, et al. Z. Metallkd. Vol. 94(2003), p.553.
5. J.F. Nie, B.C. Muddle. scripta materialia. Vol. 40. 10 (1999), p.1089.