Changes in order and texture during annealing of heavily cold-rolled Ni3Al(B,Zr) alloy

Abstract

This article describes the changes in order and texture of a 73 pct cold-rolled Ni 3 Al(B, Zr) alloy after it is subjected to recrystallization annealing. In the initial stages of annealing, the deformed starting material undergoes both recovery and reordering. This is followed by recrystallization with continued annealing. The cold-rolled material, which has a DO 22 structure, undergoes a change in order during the recovery stage, leading to the formation of the earlier L1 2 structure. This is accompanied by a drastic decrease in the texture severity. The weak texture at the end of the recovery/reordering stage persists even during recrystallization, and this finally leads to the formation of a weak texture.

A Study of Microstructures and Tensile Properties of Two Fe-Mn-Al-Si-C Alloys

“…One such interesting example can be seen in a Ni 3 Al-based duplex alloy. [17,18] In the present case, the order parameter increased again as soon as the material was subjected to heat treatment and remained almost constant thereafter. This observation clearly indicates that the so-called bcc ferrite phase of this steel is basically an ordered DO 3 phase.…”

Recrystallization behavior of a heavily cold-rolled Ni3Al(B,Zr) alloy

“…X-ray diffraction (XRD) study and textural changes during annealing have been reported elsewhere. [1] The present report deals mainly with the transmission electron microscopic study and recrystallisation kinetics.…”

“…This has been reported in an earlier article. [1] The very first grains to recrystallize during annealing were found to be small grains of fcc ␥, preferentially in the shear band regions. This has also been reported in the article.…”

“…This has also been reported in the article. [1] The newly formed recrystallized grains of ␥ almost invariably show the presence of particles inside, which look like discontinuous (cellular) precipitation. Figures 3(a) and (b) show different morphologies of the discontinuous precipitation occurring within the early recrystallized grains.…”

“…A systematic study was carried out, for looking into the deformation and recrystallization behaviors of this material. In a previous communication, [1] the changes in order and crystallographic texture during annealing of heavily cold-worked Ni 3 Al(B, Zr) alloy were reported. The detailed studies on various changes during cold deformation are available in two other communications.…”