TY - JOUR
T1 - Mechanical behavior and microstructure characterization of sinter-forged SiC particle reinforced aluminum matrix composites
AU - Chawla, Nikhilesh
AU - Williams, J. J.
AU - Saha, R.
N1 - Funding Information:
The authors are grateful for financial support from the United States Automotive Materials Partnership (USAMP) through a grant from the Department of Energy.
PY - 2002/11
Y1 - 2002/11
N2 - A novel, low-cost sinter-forging approach to processing particle reinforced metal matrix composites for high-performance applications was examined. The microstructure of the sinter-forged composites exhibited relatively uniform distribution of SiC particles, which appeared to be somewhat aligned perpendicular to the forging direction. The degree of alignment and interparticle bond strength was not as high as that observed for the extruded composite. The sinter-forged composite exhibited higher Young's modulus and ultimate tensile strength than the extruded material, but lower strain-to-failure. The higher modulus and strength were attributed to the absence of any significant processing-induced particle fracture, while the lower strain-to-failure was caused by poorer matrix interparticle bonding compared to the extruded material. Fatigue behavior of sinter-forged composites was similar to that of the extruded material. Fe-rich inclusions were extremely detrimental to fatigue life. Cleaner processing, which eliminated the inclusions, enhanced the fatigue life of the sinter-forged composites to levels similar to that of the extruded material.
AB - A novel, low-cost sinter-forging approach to processing particle reinforced metal matrix composites for high-performance applications was examined. The microstructure of the sinter-forged composites exhibited relatively uniform distribution of SiC particles, which appeared to be somewhat aligned perpendicular to the forging direction. The degree of alignment and interparticle bond strength was not as high as that observed for the extruded composite. The sinter-forged composite exhibited higher Young's modulus and ultimate tensile strength than the extruded material, but lower strain-to-failure. The higher modulus and strength were attributed to the absence of any significant processing-induced particle fracture, while the lower strain-to-failure was caused by poorer matrix interparticle bonding compared to the extruded material. Fatigue behavior of sinter-forged composites was similar to that of the extruded material. Fe-rich inclusions were extremely detrimental to fatigue life. Cleaner processing, which eliminated the inclusions, enhanced the fatigue life of the sinter-forged composites to levels similar to that of the extruded material.
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U2 - 10.1016/S1471-5317(03)00005-1
DO - 10.1016/S1471-5317(03)00005-1
M3 - Article
AN - SCOPUS:0036876714
SN - 1471-5317
VL - 2
SP - 215
EP - 227
JO - Journal of Light Metals
JF - Journal of Light Metals
IS - 4
ER -