TY - JOUR AU - Kaiser, M. S. AU - Shorowordi, K. M. AU - Rashed, H. M. Mamun Al PY - 2019/04/23 Y2 - 2024/03/29 TI - Effect of rolling on the fractional recrystallization behaviour of Al-Mg and Al-Mg-Zr alloys JF - Journal of Mechanical Engineering JA - J. mech. eng. VL - 48 IS - 1 SE - Articles DO - 10.3329/jme.v48i1.41091 UR - https://www.banglajol.info/index.php/JME/article/view/41091 SP - 24-29 AB - <p>One set of Al–Mg and Al-Mg-Zr alloys are directly cold rolled and other set of those alloys are hot rolled&nbsp;and then cold rolled using a laboratory rolling mill. The effect of rolling on the fractional recrystallization of the&nbsp;alloys has been investigated using the micro-hardness variation. Isothermally annealed samples are also studied&nbsp;using JMAK type analysis to see if there exists any correlation between experimental and JMAK type analysis.&nbsp;From the microstructure, it is observed that the Al-Mg alloy becomes almost fully recrystallized state after&nbsp;annealing at 600°K for 60 minutes. The results also show that recrystallization fraction obtained by the two&nbsp;methods, shows the higher variation in zirconium added Al-Mg alloy as compared to the Al-Mg alloy. The&nbsp;fractional recrystallization of the cold rolled Al-Mg-Zr alloy is significantly lower than that of cold rolled Al-Mg&nbsp;alloy and hot and colled rolled Al-Mg-Zr, owing to the presence of fine Al<sub>3</sub>Zr precipitates. These metastable L1<sub>2</sub>&nbsp;Al<sub>3</sub>Zr precipitates are thermally stable at high annealing temperatures.</p> ER -