首页|TiB2对AlSi10MnMg合金压铸态组织及力学性能的影响

TiB2对AlSi10MnMg合金压铸态组织及力学性能的影响

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基于TiB2增强AlSi10MnMg合金压铸件,研究TiB2颗粒对AlSi10MnMg合金铸件组织及力学性能的影响.结果表明,引入TiB2降低了预结晶晶粒(ESCs)的尺寸,改善了富铁相的尺寸及形貌,AlSi10MnMg合金的屈服强度、抗拉强度和伸长率同步提高.当TiB2添加量为0.018%时,合金的屈服强度、抗拉强度和伸长率达到160.5 MPa、296.3 MPa和6.7%,较AlSi10MnMg合金分别提高了5.3%、11.5%以及115.9%.试样的拉伸断口观察发现有许多细小的韧窝和较少的撕裂棱,主要断裂机制为韧脆混合断裂.进一步增大TiB2添加量,韧窝数量减少,断面处脆性断裂比例升高.
Effects of TiB2 on Microstructure and Properties of As-cast AlSi10MnMg Alloy
The effects of TiB2 particles on the microstructure and mechanical properties of TiB2 reinforced AlSi10MnMg alloy casting were investigated.The results indicate that the size of external solidified crystals(ESCs)is decreased and the size and morphology of Fe-rich phases are improved with the addition of TiB2.As a result,the yield strength,tensile strength and elongation of AlSi10MnMg alloy are improved simultaneously.When the content of TiB2 is 0.018%,the yield strength,tensile strength and elongation of the alloy reach 160.5 MPa,296.3 MPa and 6.7%,which are 5.3%,11.5%and 115.9%higher than that of AlSi10MnMg alloy,respectively.The tensile fracture observation reveals that there exist many small dimples and few tearing ridges,and the fracture mechanism is dominated by mixed ductile-brittle fracture.With the content of TiB2 further increasing,the number of dimples is reduced,and the proportion of brittle fracture is increased.

TiB2Vacuum Die-castingMicrostructureMechanical Properties

刘新华、朱洪军、陈明岚、冯恩浪、郝志刚、陈宗宁、郭恩宇、康慧君、方建儒、王同敏

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大连理工大学材料科学与工程学院,大连 116024

大连科技学院,大连 116036

大连亚明汽车部件股份有限公司,大连 116041

大连理工大学宁波研究院,宁波 315016

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TiB2 真空压铸 显微组织 力学性能

国家重点研发计划资助项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目辽宁省科技计划资助项目辽宁省科技计划资助项目大连市科技创新基金资助项目大连市科技创新基金资助项目广西科技重大专项资助项目中央高校基本科研业务费资助项目

2022YFB3400141U22A20174521743565202201751927801519710512022010005-JH6/10012022JH2/10132020JJ25CY0022020J12GX037桂科AA22068084

2024

10.15980/j.tzzz.2024.01.009

特种铸造及有色合金
中国机械工程学会铸造分会

特种铸造及有色合金

CSTPCD北大核心
影响因子：0.481
ISSN：1001-2249
年,卷(期)：2024.44(1)
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