The influence of reheating temperatures on hot ductility is investigated in two Ni-, Mo-, and Cu-containing low-carbon steels. The effects of solution treatment conditions at 1623, 1673 K, and remelting at 1803 K on the reduction in area (RA) are analyzed. The results show an RA trough in the range of 973–1173 K in all experimental conditions. At 9...
Severe plastic deformation (SPD) processing of polycrystalline metals is often used to obtain ultra-fine grained and nano-crystalline microstructures. Increasing the strain rate during the SPD process is known to have a favorable effect on both grain fragmentation and mechanical properties, mainly through its effect on dislocation densities and twi...
© 2018 Elsevier B.V. The effect of chemical composition on microstructure and mechanical properties of heavily alloyed beta-titanium Ti-Nb(V)-Cu-Co-Al alloys was studied. The alloys were fabricated by casting into a water-cooled copper crucible employing relatively high cooling rates. The microstructure of these alloys consists of primary micromete...
The room-temperature tensile strength, toughness, and high-temperature creep strength of 2000, 6000, and 7000 series aluminum alloys can be improved significantly by dispersing up to 1 wt% carbon nanotubes (CNTs) into the alloys without sacrificing tensile ductility, electrical conductivity, or thermal conductivity. CNTs act like forest dislocation...
Three layer steel sheets composed of a twinning-induced plasticity (TWIP) steel core and two interstitial free (IF) steel sheath layers are processed by high-pressure torsion (HPT) up to 1 turn under an applied pressure of 6 GPa. The HPT-processed layered sheets demonstrate extraordinarily enhanced mechanical properties, showing high strength as we...
The effect of interfacial bonding strength has been investigated in relation to mechanical properties of roll-bonded two-ply Mg/Al clad sheets in this study. Two types of thin reaction layers (Mg17Al12 and Mg2Al3 phase layers) were observed to form along the Mg/Al interface and their thickness was found to increase with annealing time. The maximum ...
The effect of Y addition on the slip behavior of an edge dislocation on basal, prismatic and second-order pyramidal slip planes of Mg has been investigated using a molecular dynamics simulation. It is found that Y increases the critical resolved shear stress of basal slip more than that of non-basal slip and eventually reduces the difference in the...
In order to improve mechanical properties of Ti-based amorphous matrix composites basically composed of ductile beta-Ti dendrites and brittle amorphous matrix by overcoming their inherent brittle nature, their fracture mechanisms should be verified in relation with microstructure, stress intensity factor level, and crack growth rate. In this study,...
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