Exploring the Microstructure-Property Relationship of Mg-Al-Mn alloys enhanced via Friction Stir Processing

Conference · Mon Jan 03 04:00:00 EST 2022

DOI:https://doi.org/10.1007/978-3-030-92533-8_33· OSTI ID:1861425

Garcia, David ^[1]; Das, Hrishikesh ^[1]; Ma, Xiaolong ^[1]; Roosendaal, Timothy J. ^[1]; Grant, Glenn J. ^[1]; Komarasamy, Mageshwari ^[1]

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1. BATTELLE (PACIFIC NW LAB)

Friction Stir Processing (FSP) is a solid-state thermomechanical processing technique that enables local grain refinement, densification, and homogenization of microstructure in metallic components. Here, FSP is applied to thin sheets of high-pressure die cast AM60 to address the porosity and heterogeneities inherent to the casting process. In this work, microstructure characterization is correlated to improvements in the static mechanical properties of the Mg-Al-Mn alloy system at various FSP processing conditions. Notably, there is a significant increase in the ductility and ultimate tensile stress of system following FSP. The dominant deformation mechanisms for the as-cast material and the FSP material are investigated. Finally, the fatigue life improvement is correlated to microstructure modifications that may lead to distinct behavior in crack initiation and crack propagation for the as-cast and FSP material.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1861425
• Report Number(s): PNNL-SA-167290
• Country of Publication: Switzerland
• Language: English