难熔铁镁合金系统搅拌摩擦辅助划擦焊接过程中的界面反应

Das Hrishikesh, Upadhyay Piyush, Wang Tianhao, Gwalani Bharat, Ma Xiaolong

Applied Materials and Manufacturing Group, Pacific Northwest National Laboratory, Richland, WA, USA.

Physical and Computational Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA.

Sci Rep. 2021 Jan 15;11(1):1588. doi: 10.1038/s41598-021-81266-9.

We report on interfacial characteristics and chemistry of bonded Mg-Fe interfaces welded using friction stir assisted scribe technique (FaST). Two pairs of dissimilar joints: (AZ31-DP590) and (Pure Mg-DP590) were studied to shed light on joining mechanisms responsible for bonding of "immiscible" pairs of Mg and Fe. We present first direct experimental evidence of presence of oxide layer, Al segregation by atom probe tomography and nano steel grains close to interface by transmission electron microscopy study.

我们报告了采用搅拌摩擦辅助划线技术（FaST）焊接的镁铁界面的界面特性和化学性质。研究了两对异种接头：（AZ31-DP590）和（纯镁-DP590），以阐明负责镁和铁“不混溶”对结合的连接机制。我们首次通过实验直接证明了氧化层的存在、原子探针断层扫描法检测到的铝偏析以及透射电子显微镜研究发现的靠近界面的纳米钢晶粒。