原位TiB_(2)颗粒对AlSi10Mg合金组织和力学性能的影响  

Effects of In-situ TiB_(2) Particles on Microstructure and Mechanical Properties of AlSi10Mg Alloy

作　　者：赵浩宇 江鸿翔[1,2,3,4] 李世欣 赵九洲 张丽丽[3,4] 何杰[3,4] Zhao Haoyu;Jiang Hongxiang;Li Shixin;Zhao Jiuzhou;Zhang Lili;He Jie(School of Rare Earths,University of Science and Technology of China,Ganzhou 341119;Ganjiang Innova-tion Academy,Chinese Academy of Sciences,Ganzhou 341119;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016;School of Materials Science and Engineering,University of Science and Technol-ogy of China,Shenyang 110016)

机构地区：[1]中国科学技术大学稀土学院,赣州341119 [2]中国科学院赣江创新研究院,赣州341000 [3]中国科学院金属研究所,沈阳110016 [4]中国科学技术大学材料科学与工程学院,沈阳110016

出　　处：《特种铸造及有色合金》2024年第5期663-668,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(U21A2043,52174380);福建省科技计划资助项目(2021T3041,2021T3030);广西科技重大专项资助项目(2022JBGS041)。

摘　　要：Al-Si合金由于具有优异的可铸造性、耐腐蚀性和良好的力学性能,在航空航天和交通运输等领域得到了广泛的应用。近年来,科技的不断发展对Al-Si合金的耐热性能也提出了更高的要求。研究了原位TiB_(2)颗粒对Al-Si系合金组织以及室温和高温性能的影响。结果表明,原位TiB_(2)颗粒的引入不仅能作为α-Al的异质形核质点、细化基体晶粒,而且能抑制共晶Si的生长、变质共晶Si。此外,合金的抗拉强度、屈服强度和弹性模量均随TiB_(2)颗粒含量的增加而不断增大。添加10%的TiB_(2)颗粒后,室温条件下(24℃)合金的抗拉强度、屈服强度和弹性模量分别由155 MPa、103 MPa和75.2 GPa增加到206 MPa、133 MPa和89.3 GPa;200℃条件下合金的抗拉强度、屈服强度和弹性模量分别由112 MPa、70 MPa和68.5 GPa增加到137 MPa、89 MPa和81.2 GPa。Al-Si alloys have been widely used in fields such as aerospace and transportation due to the excellent cast⁃ability,corrosion resistance,and desirable mechanical properties.In recent years,with the continuous development of technology,higher requirements have been put forward for the heat resistance performance of Al-Si alloys.Effects of in-situ TiB_(2) particles on microstructure and properties of AlSi10Mg alloy at room temperature and high temperature were investigated.The results indicate that the introduction of in-situ TiB_(2) particles can not only act as the heteroge⁃neous nucleation ofα-Al to refine the matrix grains,but also inhibit the growth of eutectic Si,modifying eutectic Si.Furthermore,the tensile strength,yield strength,and elastic modulus of the alloy are increased with the increase of TiB_(2) particle content.After adding 10%TiB_(2) particles,the tensile strength,yield strength,and elastic modulus of the alloy at room temperature(24℃)are increased from 155 MPa,103 MPa,and 75.2 GPa to 206 MPa,133 MPa,and 89.3 GPa,respectively.The tensile strength,yield strength,and elastic modulus of the alloy are increased from 112 MPa,70 MPa,and 68.5 GPa to 137 MPa,89 MPa,and 81.2 GPa at 200℃,respectively.

关 键 词：铝合金 原位TiB_(2)颗粒 力学性能 弹性模量 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TB331[金属学及工艺—金属材料]