基金financially supported by the Natural Science Foundation of Hunan Province(Nos.2020JJ4114,2016JJ3151)the National Natural Science Foundation of China(No.51601229)+2 种基金the Young Elite Scientist Sponsorship Program by CAST(No.2015QNRC001)the Hunan Province Innovation Platform and Talent Plan Project,China(No.2015RS4001)the Open-End Fund for the Valuable and Precision Instruments of Central South University,China(No.CSUZC201815)。
文摘采用选择激光熔化(SLM)技术在不同工艺参数下制备Al-4.77Mn-1.37Mg-0.67Sc-0.25Zr合金(质量分数,%),通过拉伸试验和显微观察研究合金的组织和力学性能。结果表明:当能量密度为104~143 J/mm^(3)时,力学性能保持相对稳定;屈服强度为335~338 MPa,抗拉强度为397~400 MPa,伸长率均在11%以上。在此能量密度区间内,SLM合金缺陷和粗大金属间化合物较少,与此同时,有大量细小的Al Fe Mn Sc Zr相析出。当能量密度超过152 J/mm^(3)时,可以观察到一些孔洞和裂纹,且伸长率急剧下降。定量计算结果表明,该合金固溶强化、晶界强化和析出强化占比分别为44%、41%和15%。
基金the financial supports from the Natural Science Foundation of Hunan Province, China (Nos. 2020JJ4114, 2016JJ3151)the National Natural Science Foundation of China (No. 51601229)+2 种基金the Young Elite Scientist Sponsorship Program by CAST, China (No. 2015QNRC001)the Hunan Province Innovation Platform and Talent Plan Project, China (No. 2015RS4001)the Open-end Fund for the Valuable and Precision Instruments of Central South University, China (No. CSUZC201815)。
基金financially supported by the Natural Science Foundation of Hunan Province,China(Nos.2020JJ4114,2016JJ3151)the National Natural Science Foundation of China(No.51601229)+2 种基金the Young Elite Scientist Sponsorship Program by CAST,China(No.2015QNRC001)the Hunan Province Innovation Platform and Talent Plan,China(No.2015RS4001)the Open-End Fund for the Valuable and Precision Instruments of Central South University,China(No.CSUZC201815)。
