Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012263 | Transactions of Nonferrous Metals Society of China | 2016 | 7 Pages |
Abstract
The effects of Sn addition on the microstructure and mechanical properties of gas tungsten arc butt-welded Mg-6Al- 0.3Mn (AM60) (mass fraction, %) alloy sheets were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and microhardness and tensile tests. The results indicate that both the average microhardness and joint efficiency of AM60 are improved by the addition of 1% Sn (mass fraction). The ultimate tensile strength of Mg-6Al-1Sn-0.3Mn (ATM610) reaches up to 96.8% of that of base material. Moreover, fracture occurs in the fusion zone of ATM610 instead of in the heat-affected zone of AM60 welded joint. The improvement in the properties is mainly attributed to the formation of Mg2Sn, which effectively obstructs the grain coarsening in the heat-affected zone, resulting in a relatively fine microstructure. The addition of 1% Sn improves the mechanical properties of AM60 welded joint.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jun GOU, Ai-tao TANG, Fu-sheng PAN, Jia SHE, Su-qin LUO, Jun-hua YE, Da-wei SHI, M. RASHAD,