TY  - JOUR
AU  - Wang, Yunsheng
AU  - Inoue, Shin-ichi
AU  - Kawamura, Yoshihito
PY  - 2026
TI  - Extruded Mg97.37Zn1.88Y0.75 alloy with both high thermal conductivity and mechanical strength
JO  - Journal of Magnesium and Alloys
SN  - 2213-9567
VL  - 16
IS  - C
AB  - In our previous study, we observed that the Mg97.37Zn1.88Y0.75 (at%) alloy, composed of α-Mg, the W phase (Mg3Zn3Y2), and a small quantity of the I phase (Mg3Zn6Y) exhibited an extremely high thermal conductivity of 141 Wm-1K-1 attributable to the precipitation of a large amount of the fine W phase through heat treatment at 633 K for 15 h. In the present study, we examined how extrusion conditions affect the thermal conductivity and mechanical properties of the Mg97.37Zn1.88Y0.75 alloy with high thermal conductivity. As a result, an extruded Mg alloy was developed, exhibiting excellent properties, including a thermal conductivity of 131 Wm-1K-1, a tensile strength of 361 MPa, and an elongation of 9.7%. These superior mechanical properties were obtained by optimizing extrusion conditions, thereby inducing dynamic recrystallization during the process to refine the α-Mg matrix and causing the dynamically recrystallized area, which consisted of grains with lower strain and random orientation, to expand. Furthermore, a decline in thermal conductivity by 9–11 Wm-1K-1 was observed following extrusion, independent of the specific processing parameters.
UR  - https://doi.org/10.1016/j.jma.2025.09.028
DO  - 10.1016/j.jma.2025.09.028