中国有色金属学会会刊（英文版）
中國有色金屬學會會刊（英文版）
중국유색금속학회회간（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2004年
6期
1100-1105
,共6页
尹德良%张凯锋%王国峰%韩文波
尹德良%張凱鋒%王國峰%韓文波
윤덕량%장개봉%왕국봉%한문파
AZ31 Mg alloy%superplasticity%microstructure evolution%dynamic recrystallization
AZ31 Mg alloy%superplasticity%microstructure evolution%dynamic recrystallization
AZ31 Mg alloy%superplasticity%microstructure evolution%dynamic recrystallization
Superplastic mechanical properties of fine-grained AZ31 Mg alloy sheets in the temperature range of 250 - 450 ℃ and strain rate range of 0.7 × 10-3- 1.4 × 10-1 s-1 were investigated by uniaxial tensile tests. The microstructure evolution during the superplastic deformation of AZ31 Mg alloy was examined by means of metallurgical microscope and transmission electronic microscope (TEM). It is shown that, fine-grained AZ31 Mg alloy starts to exhibit superplasticity at 300 ℃ and the maximum elongation of 362.5% is obtained at 400 ℃ and 0.7× 10-3 s-1.The predominate superplastic mechanism of AZ31 Mg alloy in the temperature range of 300 -400 ℃ is grain boundary sliding (GBS). Twinning caused by pile-up of dislocations during the early stage of superplastic deformation is the hardening mechanism, and dynamic continuous recrystallization (DCRX) is the important softening mechanism and grain stability mechanism during the superplastic deformation of the alloy.
Superplastic mechanical properties of fine-grained AZ31 Mg alloy sheets in the temperature range of 250 - 450 ℃ and strain rate range of 0.7 × 10-3- 1.4 × 10-1 s-1 were investigated by uniaxial tensile tests. The microstructure evolution during the superplastic deformation of AZ31 Mg alloy was examined by means of metallurgical microscope and transmission electronic microscope (TEM). It is shown that, fine-grained AZ31 Mg alloy starts to exhibit superplasticity at 300 ℃ and the maximum elongation of 362.5% is obtained at 400 ℃ and 0.7× 10-3 s-1.The predominate superplastic mechanism of AZ31 Mg alloy in the temperature range of 300 -400 ℃ is grain boundary sliding (GBS). Twinning caused by pile-up of dislocations during the early stage of superplastic deformation is the hardening mechanism, and dynamic continuous recrystallization (DCRX) is the important softening mechanism and grain stability mechanism during the superplastic deformation of the alloy.
Superplastic mechanical properties of fine-grained AZ31 Mg alloy sheets in the temperature range of 250 - 450 ℃ and strain rate range of 0.7 × 10-3- 1.4 × 10-1 s-1 were investigated by uniaxial tensile tests. The microstructure evolution during the superplastic deformation of AZ31 Mg alloy was examined by means of metallurgical microscope and transmission electronic microscope (TEM). It is shown that, fine-grained AZ31 Mg alloy starts to exhibit superplasticity at 300 ℃ and the maximum elongation of 362.5% is obtained at 400 ℃ and 0.7× 10-3 s-1.The predominate superplastic mechanism of AZ31 Mg alloy in the temperature range of 300 -400 ℃ is grain boundary sliding (GBS). Twinning caused by pile-up of dislocations during the early stage of superplastic deformation is the hardening mechanism, and dynamic continuous recrystallization (DCRX) is the important softening mechanism and grain stability mechanism during the superplastic deformation of the alloy.
