TY - JOUR
T1 - Quaternary Mg–Zn–Y–Gd Alloys
T2 - Controlled biodegradation via Gd Alloying and thermomechanical treatment
AU - Al Amin, Syed Muhammad
AU - Ava, Kazi Nosheen
AU - Akter, Surya
AU - Shaown, Rashidun Nawaz
AU - Al Rashed, H. M.Mamun
AU - Nahar, Samsun
AU - Barnana, Hema Dinesh
AU - Syed, Syed Ansar
AU - Ul-Haq, Ehtsham
AU - Gulshan, Fahmida
N1 - Publisher Copyright:
© The Author(s) 2025
PY - 2025
Y1 - 2025
N2 - Magnesium alloys show promise as biodegradable implants but require degradation rate control. This study examines Gd additions (0–2 wt.%) and thermomechanical processing (hot rolling, extrusion) on Mg-2Zn-0.5Y alloys. XRD and microscopy reveal Gd forms Mg3 Zn3 Gd2 phases, refining grains to ∼205 μm without altering the α-Mg matrix. Hardness increases with Gd content due to precipitation and Hall-Petch strengthening from dynamic recrystallization. However, Gd elevates galvanic corrosion between Mg3 Zn3 Gd2 and the matrix, raising corrosion rates by ∼48% at 2 wt.% Gd. Extrusion mitigates galvanic effects, reducing corrosion versus as-cast alloys. These insights on synergies between composition, microstructure, and thermomechanical processing advance knowledge for designing biodegradable Mg implants with tailored degradation.
AB - Magnesium alloys show promise as biodegradable implants but require degradation rate control. This study examines Gd additions (0–2 wt.%) and thermomechanical processing (hot rolling, extrusion) on Mg-2Zn-0.5Y alloys. XRD and microscopy reveal Gd forms Mg3 Zn3 Gd2 phases, refining grains to ∼205 μm without altering the α-Mg matrix. Hardness increases with Gd content due to precipitation and Hall-Petch strengthening from dynamic recrystallization. However, Gd elevates galvanic corrosion between Mg3 Zn3 Gd2 and the matrix, raising corrosion rates by ∼48% at 2 wt.% Gd. Extrusion mitigates galvanic effects, reducing corrosion versus as-cast alloys. These insights on synergies between composition, microstructure, and thermomechanical processing advance knowledge for designing biodegradable Mg implants with tailored degradation.
KW - biodegradable implant
KW - corrosion
KW - electrochemical testing
KW - magnesium alloys
KW - microstructure
KW - thermomechanical processing
UR - https://www.scopus.com/pages/publications/105023514241
U2 - 10.1177/02670836251379594
DO - 10.1177/02670836251379594
M3 - Article
AN - SCOPUS:105023514241
SN - 0267-0836
JO - Materials Science and Technology (United Kingdom)
JF - Materials Science and Technology (United Kingdom)
ER -