Effect of Plastic Deformation on the Microscopic Residual Stresses in 6061Al-15vol%SiCw Composites
Effect of Plastic Deformation on the Microscopic Residual Stresses in 6061Al-15vol%SiCw Composites
The aim of this work was to correlate the plastic pre-straining with the relaxation of the residual stress, RS, of several metal matrix composites that underwent different levels of plastic deformation. RS were calculated from neutron diffraction measurements. Results show that both macro and micro-stresses decrease rapidly with only 1% plastic strain; little relaxation occurs with further strain. The hydrostatic component of the micro-stress relaxes, while the deviatoric one stays constant.
Projects MAT 97-1059-C02-01 from CICYT and 07N-0066-98 from CAM, Spain, and support from NFL (Studsvik) under contract nº N01 HPRI-CT-1999-00061 in the frame of ARI Program. Help from Mihail Butman, NFL, Studsvik, who performed the compression tests is gratefully acknowledge.
Peer reviewed
Neutron Diffraction, Metal matrix composites, Metal Matrix Composite (MMC), Neutron diffraction
Neutron Diffraction, Metal matrix composites, Metal Matrix Composite (MMC), Neutron diffraction
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