Investigation of Prism 〈a〉 Slip in Warm-Rolled AZ31 Alloy

Abstract

Based on analysis of texture and in-grain misorientation axes (IGMA) distribution, we investigate the effects of initial orientation and deformation temperature on the rollability of magnesium alloy AZ31 and the associated deformation mechanisms. Plate samples oriented favorably for basal hai slip exhibited the best rollability at room temperature, whereas under the warm-rolling condition, surprisingly, the plate oriented for prism hai slip exhibited the best rollability. The enhanced rollability of the latter plate is attributed to increased activity of prism hai slip, which exhibits a lower texture hardening rate than basal hai slip. The increased activity of prism hai slip is shown experimentally by the development of the h10 " 10i//RD texture and h0001i-type IGMA distribution. Asymmetric texture is also suggested to impair the rollability of plate oriented for basal hai slip.

Texture effects on development of shear bands in rolled AZ31 alloy

“…10) reveals that there are no pronounced shear bands although the edge cracks are initiated at the strain. It is shown in previous work [22] that the TB plate exhibits an excellent rollability at 150 1C, which is attributed to promotion of prism /aS slip at the temperature. In addition, a good portion of grains in the TB plate is deformed by tension twinning (Figs.…”

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

“…Chun and Davies have recently compared the basal, prism and pyramidal slip stresses for magnesium AZ31 alloy material in terms of favoring a material texture involving prism slip for warm rolling of plate material. 26) In the fcc case, as will be described, a lowest value of m = 3.1 applies for the multiple available slip systems and there is need for cross-slip to occur at grain boundaries for transmission of plastic flow. For both crystal structure types, however, there is thermal activation in k ¾ .…”

Dislocation Mechanics of High-Rate Deformations

“…Chun and Davies have presented a comparison of the prism and pyramidal slip stresses measured in single crystal experiments. [104] Very recently, Gzyl, Rosochowski, Pesci, Olejnik et al have commented on the suppression of deformation twinning in severe plastically deformed AZ31B material having a grain size of~5 lm. [105] Excellent photomicrographs were presented of deformation twinning occurring only in~100 lm size grains of as-received material exhibiting a heterogeneous distribution of grain sizes, not unlike that shown in Figure 10.…”