Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 813, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141023
Keywords
Synchrotron characterization; Finite-element modeling; Mg-steel interface; Impact welding
Categories
Funding
- U.S. Department of Energy's Vehicle Technologies Office, Joining Core Program [DE-AC02-06CH11357]
- DOE Office of Science User Facility [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- US Department of Energy, Office of Vehicle Technology
- Oak Ridge National Laboratory (ORNL)
- U.S. Department of Energy [DE-AC05 00OR22725]
- DOE Vehicle Technologies Office under the Automotive Lightweight Materials Program
Ask authors/readers for more resources
This study investigates the characteristics of the Mg-steel interface joined by impact welding method, revealing the formation of a deposit layer at the joint interface with pores and cracks inside. Insights into the immiscible Mg-steel joining process are provided through the analysis of the void/cracking evolution in the deposit layer.
The effective weight reduction in the automotive industry by the wide adoption of lightweight magnesium (Mg) alloys demands high-quality joint between magnesium alloys and massively-used steels in order to wring the excess weight with strength and safety assurance. However, Mg-steel joint is difficult to achieve because there is no mutual solubility between magnesium and steel and huge disparity in physical properties. An impact-based welding method recently showed successful Mg-steel joining. In this work, the characteristics of Mg-steel interface joined by the impact welding method were investigated. Synchrotron high-energy X-ray computed tomography and diffraction were applied to characterize the microstructure across Mg-steel interface. Results revealed a deposit layer formed at the joint interface where Fe-rich particles spread deep into the Mg matrix. High-resolution 3D morphology of Mg-steel interface demonstrated the trapped pores and cracks inside the deposit layer. The formation of the deposit layer and the void/cracking evolution were analyzed by using finite element models. These findings provide insights into the immiscible Mg-steel joining process.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available