Residual Strain Measurements in a Friction-Stir Processed AZ31B magnesium Alloy Using Neutron Diffraction

Conference · Mon Jan 01 04:00:00 EST 2007

DOI:https://doi.org/10.4028/www.scientific.net/MSF.539-543.3795· OSTI ID:1364238

Woo, Wan Chuck ^[1]; Choo, Hahn ^[1]; Brown, D. W. ^[2]; Clausen, B ^[2]; Feng, Zhili ^[1]; Liaw, Peter K ^[3]

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1. ORNL
2. Los Alamos National Laboratory (LANL)
3. University of Tennessee, Knoxville (UTK)

Residual strain profiles in friction-stir processed (FSP) AZ31B magnesium-alloy plates were measured using neutron diffraction. Two different specimens were prepared to investigate the influences of the tool shoulder and the tool pin on the residual-strain profiles: (Case 1) a plate processed with both the stirring pin and tool shoulder, i.e., a regular FSP plate subjected to both the plastic deformation and frictional heating, and (Case 2) a plate processed only with the tool shoulder, i.e., subjected mainly to the frictional heating. The results show that the strain profiles of both cases are qualitatively quite similar. The longitudinal strain is mainly tensile with its maximum near the bead of the FSP plate. On the other hand, the transverse and normal strains are mildly compressive in both Cases 1 and 2.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); High Temperature Materials Laboratory (HTML)
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1364238
• Country of Publication: United States
• Language: English

Related Subjects

Friction-stir processing
Magnesium alloys
Neutron diffraction
Residual strain