Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8011964 | Transactions of Nonferrous Metals Society of China | 2017 | 8 Pages |
Abstract
Fine-grained Mg-5Zn-1Mn-0.6Sn alloy sheets of 2 mm in thickness were welded by fiber laser welding. The appearance and microstructures of the welding joints and liquation behaviors in the partially melted zone (PMZ) were investigated. The results show that, with the lower welding power and higher welding speed, the width and depth of the joints decrease. Moreover, some pores are detected at a very high welding speed. There are two kinds of liquation phenomena in the PMZ. One is the liquation network along grain boundaries associated with the liquation of substrate and segregation-induced liquation, the other is the molten pool involved with the liquation of the residual second phases at the boundaries. However, the liquation of substrate and the segregation-induced liquation are the main liquation mechanism in the PMZ.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Qing-yuan SHE, Hong-ge YAN, Ji-hua CHEN, Bin SU, Zhao-hui YU, Chao CHEN, Wei-jun XIA,