Details

Autor(en) / Beteiligte

• Wang, Xin
• Wu, Mengling
• Ma, Wenliang
• Lu, Yi
• Yuan, Shuai

Titel

Achieving Superplasticity in AZ31 Magnesium Alloy Processed by Hot Extrusion and Rolling

Ist Teil von

• Journal of materials engineering and performance, 2016-01, Vol.25 (1), p.64-67

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Experiments were conducted on ultrafine-grained AZ31 magnesium alloy sheet which was prepared through nano-grained powders processed by hot extrusion at 300 °C plus hot-rolling for four passes at 200. The superplastic behavior had been evaluated in a low-temperature range of 423-523 K and strain rates varied from 5 × 10 −4 to 5 × 10 −3 s −1 . The experiment results showed that tensile testing revealed the superplastic elongations with a maximum measured elongation of 227% when tested at 523 K and strain rate of 5 × 10 −4 s −1 . The superplastic deformation behavior was attributed to the ultrafine-grained microstructures. The measured elongations mainly depended upon the initial strain rate and temperature, and the strain rate sensitivity m was ~0.5 for this condition. The results indicated that powder metallurgy and subsequent hot extrusion plus rolling were promising approaches to produce the ultrafine-grained magnesium alloy sheet with superplasticity.