High-strength extruded Mg-Al-Ca-Mn alloy

作者：Xu S W^*; Oh ishi K; Kamado S; Uchida F; Homma T; Hono K

来源：Scripta Materialia, 2011, 65(3): 269-272.

DOI：10.1016/j.scriptamat.2011.04.026

• Magnesium alloy
• Rare-earth-free
• Extrusion
• Microstructures
• Mechanical properties

We have developed an extraordinary high-strength rare-earth-free magnesium (Mg) alloy by extruding a direct chill cast Mg3.5Al-3.3Ca-0.4Mn (wt.%) ingot. The as-extruded sample exhibited a tensile 0.2% proof stress of 410 MPa, an ultimate tensile strength of 420 MPa and an elongation to failure of 5.6%. The high strength is attributed to the combined effect of fine dynamically recrystallized grains pinned with fragmented Al-Ca intermetallic compounds, nanoscale plate-like Al-Ca precipitates, spherical Al-Mn-Ca precipitates and a strong basal texture.

• 出版日期2011-8