Hits:

Indexed by:期刊论文

Date of Publication:2018-10-01

Journal:MATERIALS CHARACTERIZATION

Included Journals:SCIE

Volume:144

Page Number:42-47

ISSN No.:1044-5803

Key Words:Whisker reinforced composites; Residual stress; Plastic deformation; Fracture; Band-like distribution

Abstract:Ductile aluminum matrix composites reinforced by Al18B4O33 whisker (ABO) with band-like distribution (Band like Aluminum Matrix Composites, BAMCs) were fabricated by powder metallurgy and extrusion followed by annealing. The cracks tend to nucleate in the ABO-rich bands, but the band-like structure induces compressive residual stress then suppresses the crack propagation and improves the strain transferring ability in the BAMCs. The denser and smaller cracks formed in the BAMCs with higher ABO volume fraction during tensile test. These cracks play an important role in the strain non-localization process, but have negligible contribution to the tensile strain.