With the laser remelting of cast alloys combined with non-equilibrium liquidus projection thermodynamic calculations,a high-strength and heat-resistant Al-3Fe-2Mn alloy was designed.Incorporating Mn atoms into the met...With the laser remelting of cast alloys combined with non-equilibrium liquidus projection thermodynamic calculations,a high-strength and heat-resistant Al-3Fe-2Mn alloy was designed.Incorporating Mn atoms into the metastable nanoscale Al_(6)Fe phase,occupying some lattice sites,enhances its thermal stability.Additionally,during rapid solidification of laser powder bed fusion(L-PBF),the solubility of Fe and Mn elements in the aluminum alloy increases significantly,forming a supersaturated solid solution with improved strength.This alloy demonstrates excellent processability,achieving a relative density of over 99%,and tensile strengths of 295 MPa at 200℃ and 230 MPa at 300℃.The Al-3Fe-2Mn alloy holds great potential for wide applications due to its high strength at high temperature.展开更多
利用数值模拟方法模拟了在喷射成形Al Fe V Si系耐热铝合金过程中雾化液滴的飞行状态及凝固行为 ,给出了不同尺寸雾化液滴的冷却速度和固相分数随飞行距离的变化规律 ,并对雾化颗粒的形貌组织进行了观察分析。在雾化颗粒中观察到了尺寸...利用数值模拟方法模拟了在喷射成形Al Fe V Si系耐热铝合金过程中雾化液滴的飞行状态及凝固行为 ,给出了不同尺寸雾化液滴的冷却速度和固相分数随飞行距离的变化规律 ,并对雾化颗粒的形貌组织进行了观察分析。在雾化颗粒中观察到了尺寸在 1～ 10 μm的第二相 ,能谱及XRD分析表明这种第二相为Al12 (Fe ,V) 3展开更多
基金supported by the National Natural Science Foundation of China(No.U21B2073)the Science and Technology Project of the Science and Technology Department of Hubei Province,China(No.2022EHB020)。
文摘With the laser remelting of cast alloys combined with non-equilibrium liquidus projection thermodynamic calculations,a high-strength and heat-resistant Al-3Fe-2Mn alloy was designed.Incorporating Mn atoms into the metastable nanoscale Al_(6)Fe phase,occupying some lattice sites,enhances its thermal stability.Additionally,during rapid solidification of laser powder bed fusion(L-PBF),the solubility of Fe and Mn elements in the aluminum alloy increases significantly,forming a supersaturated solid solution with improved strength.This alloy demonstrates excellent processability,achieving a relative density of over 99%,and tensile strengths of 295 MPa at 200℃ and 230 MPa at 300℃.The Al-3Fe-2Mn alloy holds great potential for wide applications due to its high strength at high temperature.
