Influence of intensive melt shearing on subsequent hot rolling and the mechanical properties of twin roll cast AZ31 strips

Abstract

In the present investigation, strips were produced by melt conditioned twin roll casting (MC-TRC) process. The strips were homogenized at 400 C for one hour followed by hot rolling (400 C) process. Severe deformation was applied to deform the strip up to 40% by single and two passes. Tensile tests at elevated temperature (200 C) were conducted on TRC, MC-TRC, and hot rolled MC-TRC samples. Single pass hot rolled MC-TRC sample showed excellent tensile strength and ductility compared to the other samples. Detail microstructural studies revealed that fine grain structure can be obtained by giving maximum deformation during the hot rolling process and finer the grain size better is the tensile properties at warm forming temperature.

Controllable synthesis of nanostructured bismuth vanadate thin films as an efficient catalyst for photoelectrochemical water splitting

“…However, ethylene glycol often results in the formation of BiVO 4 nanoparticles with no {010} preferred orientation. 36,37 It was proposed that Bi ions in the solution are chelated by ethylene glycol molecules before reacting with V to form BiVO 4 colloidal nanoparticles. These nanoparticles later agglomerate to reduce the surface energy.…”

Numerical analysis of different heating systems for warm sheet metal forming

“…This heating system provides high heating rates using a simple apparatus, being adequate for characterisation of materials at elevated temperatures. Das et al [30] investigated the mechanical properties of a magnesium alloy AZ31 at warm temperature, using a Gleeble 3800 thermomechanical simulator. The tensile specimens were heated by direct resistance to 200°C and were held at this temperature during 1 min.…”

Effect of Rolling Route on Microstructure and Tensile Properties of Twin-Roll Casting AZ31 Mg Alloy Sheets

“…Twin-roll casting is an effective method to produce metal alloys while significantly reducing costs [ 1 , 2 , 3 ]. However, centerline segregation and coarse columnar dendritic grains form during the twin-roll casting process, which has a deleterious effect on the strength and ductility due to the limited quality in Mg alloys [ 3 ]. Sequential warm rolling has been developed to refine grains of Mg alloys after the twin-roll casting process [ 4 , 5 ].…”