Room temperature yielding phenomenon in extruded or/and aged Mg-14Gd-2Ag-0.5Zr alloy with fine-grained microstructure

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:787

Article

Li, R. G.¹  Zhao, D. Y.¹  Zhang, J. H.²  Li, H. R.¹  Dai, Y. Q.¹  Fang, D. Q.³ 

[1] Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China

[2] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China

[3] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

关键词: Magnesium alloy;    Extrusion;    Fine-grained structure;    Yielding;    Dislocation;   

DOI  :  10.1016/j.msea.2020.139551

来源: Elsevier

【 摘 要 】

A new phenomenon of tensile yielding plateau in the fine-grained age-type Mg-14Gd-2Ag-0.5Zr alloy is reported, which is closely related to the activation of mobile pinned-dislocations. The yielding plateau contributes similar to 6% strain in the peak-aged sample, while it contributes only similar to 2% strain in the extruded sample.

【 授权许可】

Free