Dislocation creep behavior in Mg-Al-Zn alloys

by: Hidetoshi Somekawa, Kinji Hirai, Hiroyuki Watanabe, Yorinobu Takigawa, Kenji Higashi

Materials Science and Engineering: A, Vol. 407, No. 1-2. (25 October 2005), pp. 53-61.

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Abstract

The climb-controlled dislocation creep behavior was investigated in Mg-Al-Zn alloys of AZ31, AZ61 and AZ91 with different aluminum contents. The flow stress increased with the increase of aluminum content under the same deformation conditions. At high temperatures, the stress exponent was 5 and the activation energy was close to that for lattice diffusion of magnesium, whereas at low temperatures the stress exponent was 7 and activation energy was close to that for pipe diffusion for all alloys. By incorporating the effective diffusion coefficient and stacking fault energy into a constitutive equation, the dislocation creep behavior of magnesium alloys can be described by a single relation.

@article{citeulike:345943, abstract = {The climb-controlled dislocation creep behavior was investigated in Mg-Al-Zn alloys of AZ31, AZ61 and AZ91 with different aluminum contents. The flow stress increased with the increase of aluminum content under the same deformation conditions. At high temperatures, the stress exponent was 5 and the activation energy was close to that for lattice diffusion of magnesium, whereas at low temperatures the stress exponent was 7 and activation energy was close to that for pipe diffusion for all alloys. By incorporating the effective diffusion coefficient and stacking fault energy into a constitutive equation, the dislocation creep behavior of magnesium alloys can be described by a single relation.}, author = {Somekawa, Hidetoshi and Hirai, Kinji and Watanabe, Hiroyuki and Takigawa, Yorinobu and Higashi, Kenji }, citeulike-article-id = {345943}, doi = {http://dx.doi.org/10.1016/j.msea.2005.06.059}, journal = {Materials Science and Engineering: A}, keywords = {magnesium}, month = {October}, number = {1-2}, pages = {53--61}, posted-at = {2005-10-08 22:24:29}, priority = {5}, title = {Dislocation creep behavior in Mg-Al-Zn alloys}, url = {http://dx.doi.org/10.1016/j.msea.2005.06.059}, volume = {407}, year = {2005} }

RIS record

TY - JOUR ID - citeulike:345943 L3 - citeulike-article-id:345943 TI - Dislocation creep behavior in Mg-Al-Zn alloys JF - Materials Science and Engineering: A VL - 407 IS - 1-2 SP - 53 EP - 61 N2 - The climb-controlled dislocation creep behavior was investigated in Mg-Al-Zn alloys of AZ31, AZ61 and AZ91 with different aluminum contents. The flow stress increased with the increase of aluminum content under the same deformation conditions. At high temperatures, the stress exponent was 5 and the activation energy was close to that for lattice diffusion of magnesium, whereas at low temperatures the stress exponent was 7 and activation energy was close to that for pipe diffusion for all alloys. By incorporating the effective diffusion coefficient and stacking fault energy into a constitutive equation, the dislocation creep behavior of magnesium alloys can be described by a single relation. KW - magnesium AU - Somekawa, Hidetoshi AU - Hirai, Kinji AU - Watanabe, Hiroyuki AU - Takigawa, Yorinobu AU - Higashi, Kenji PY - 2005/10/25/ UR - http://dx.doi.org/10.1016/j.msea.2005.06.059 ER -

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