CAJ | 학술논문

采用熔体直接反应法成功制备了Mg2Sip/Al复合材料,研究了Mg2Si颗粒含量及530℃固溶6h＋173℃时效5h热处理对复合材料组织和性能的影响,利用X射线衍射仪、扫描电镜等分析了复合材料的物相和显微组织,并测试了其力学性能。结果表明,随着Mg2Si颗粒含量的增加,在一定范围内,铸态复合材料基体的晶粒尺寸随之变小;热处理后Mg2Si颗粒名义含量4%（质量分数）的复合材料析出的二次相颗粒较名义含量5%（质量分数）的复合材料更多,二次相颗粒平均尺寸均约为4μm,且颗粒名义含量4%（质量分数）的复合材料热处理后抗拉强度和伸长率分别达到280MPa和9%,较热处理前分别提高了24.44%和63.64%
채용용체직접반응법성공제비료Mg2Sip/Al복합재료,연구료Mg2Si과립함량급530℃고용6h＋173℃시효5h열처리대복합재료조직화성능적영향,이용X사선연사의、소묘전경등분석료복합재료적물상화현미조직,병측시료기역학성능。결과표명,수착Mg2Si과립함량적증가,재일정범위내,주태복합재료기체적정립척촌수지변소;열처리후Mg2Si과립명의함량4%（질량분수）적복합재료석출적이차상과립교명의함량5%（질량분수）적복합재료경다,이차상과립평균척촌균약위4μm,차과립명의함량4%（질량분수）적복합재료열처리후항랍강도화신장솔분별체도280MPa화9%,교열처리전분별제고료24.44%화63.64%
The Mg2Sip/Al composites were fabricated with melt direct reaction method.The effect of Mg2Si particle content and heat treatment by solution treatment at 530℃ for 6h followed by artificial ageing at 173℃ for 5h on microstructure and performance of the composites were investigated,the phase contents and the microstructure of the composites were analyzed by XRD,SEM and EDS,and the mechanical properties were then tested.The results indicate that:in a certain range,the grain size of the matrix of the as-cast composites are getting smaller with increasing particle content;the composite with a nominal Mg2Si particle content of 4wt% after heat treatment precipitates more second phase particles than the composite with a nominal Mg2Si particle content of 5wt%,and the average size of second phase particles in both of them are about 4μm.After heat treatment,the tensile strength and the elongation of the composite with a nominal Mg2Si content particle of 4wt% reach 280MPa and 9% which are 24.44% and 63.64% higher than those before heat treatment,respectively.