Joining Between Fe₈₀Si₉B₁₁ Amorphous Ribbons And Al With High Pressure And Severe Plastic Deformation

Compared to conventional ceramic reinforcement, metallic glasses, which have aquality of metal with high strength and elastic strain limit, are believed to be morecompatible with the metal matrix. In the article, different kinds of Al-based laminatecomposites reinforced with Fe₈₀Si₉B₁₁metallic glassy ribbons have been manufacturedby rolling and HPT process. The basic physical properties, mechanical properties andmicrostructure of the composites are analyzed by using DSC, XRD, SEM, TEM, etc.After the rolling experiment, Fe₈₀Si₉B₁₁metallic glass can still maintain its glassystate. As for the composite panels prepared by a single pass rolling with80%reduction at450℃, the Al/10%wt Fe₈₀Si₉B₁₁/Al achieved the best bonding but not a real combination.There are some microdiffusions between aluminum atoms and iron atoms at the interfaceof the composite panels with5%and10%metallic glass. As the metallic glass contentcame to20%and25%, they cracked seriously. Moreover, compared to as-rolledcommercial purity aluminium, the ultimate tensile and bending strength of the Al/10%wtFe₈₀Si₉B₁₁/Al panel increased by62.7%and42.1%with the values of166MPa and297MPa, respectively.The metallic glass and aluminum alloy realized a real bonding by High-pressureTorsion（HPT） process and the interface bonding layer of the sample with4turns under1.65GPa reached to8nm. Besides, the equivalent strain values which should be neededto achieve a real bonding between the metallic glass and aluminum alloy under0.55GPa,1.10GPa,1.65GPa,2.20GPa are5.35,4.39,3.89,3.59, respectively. Accordingly, thecritical stress and strain condition to a real bonding can be expressed asy=85.25exp（-x/9.5）+0.25,where y is the hydrostatic pressure, x is the equivalent strain. This formula can providetheoretical guidance for the experimental parameters optimization in rolling.