Abstract
Abstract
The effects of strain rate on deformation behavior of the Mg-4Li and Mg-4Li-1Al alloys were investigated through tension testing and microstructure analysis. The Portevin-Le Chatelier effect was detected in tension testing of Mg-4Li alloy in the strain rate range of 5 × 10–4 s−1 ∼ 1 × 10–2 s−1, and the effect was enhanced by the addition of 1% Al. The mechanism of Portevin-Le Chatelier effect was ascribed to the interaction between primary dislocations and pre-existing secondary forest dislocations. The strain rate sensitivity indexes of both Mg-4Li and Mg-4Li-1Al alloys were found as negative. With increasing strain rate, the yield strength and tensile strength of both alloys decreased, while the elongation increased.
Funder
LiaoNing Revitalization Talents Prograrm
Subject
Metals and Alloys,Polymers and Plastics,Surfaces, Coatings and Films,Biomaterials,Electronic, Optical and Magnetic Materials