首页|Fe、Ni元素微合金化对Al-11Si铝合金微观组织及力学性能的影响

Fe、Ni元素微合金化对Al-11Si铝合金微观组织及力学性能的影响

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本研究利用扫描电子显微镜(SEM)、能量散射X射线光谱(EDS)和拉伸试验机,研究了Ni(1.2及1.6wt.%)和Fe(0.6及0.8wt.%)含量对Al-11Si铝合金的微观组织及不同温度下的力学性能的影响.实验结果表明,适量的Ni元素对于Al-11Si合金中富含Fe相的类型、形态和分布具有积极作用.在Al-11Si铝合金中添加1.2wt.%Ni和0.6wt.%Fe可以生成一种类似"汉字状"的富Fe强化相.当进一步增加到1.6wt.%Ni和0.8wt.%Fe后,富Fe相变为了长针状,对Al基体产生严重的割裂作用,降低了合金力学性能.由于含有1.2wt.%Ni和0.6wt.%Fe的Al-11Si铝合金中生成了"汉字状"富Fe强化相,合金的高温拉伸性能得到了显著改善.在350℃的测试温度下,Al-11Si铝合金的抗拉强度(UTS)达到了139 MPa.
Influence of Fe and Ni micro-alloying on the microstructure and mechanical properties of Al-11 Si aluminum alloys
The study examined the influence of different contents of Ni(1.2 and 1.6wt.%)and Fe(0.6 and 0.8wt.%)on the microstructure and me-chanical properties at different temperature of the Al-11Si aluminum alloy using scanning electron microscopy(SEM),energy dispersive X-ray spec-troscopy(EDS)and tensile testing machine.The experimental results showed that the presence of Ni element positively affected the type,morphology and distribution of the Fe-rich phase in Al-11Si aluminum alloy.The addition of 1.2wt.%Ni and 0.6wt.%Fe in the Al-11Si aluminum alloy formed a Chinese character-shaped Fe-rich enhanced phase.When the Ni content was further increased to 1.6wt.%and the Fe content was increased to 0.8 wt.%,the Fe-rich phase changed to long needle-like structure,leading to severe cracking in the Al matrix and a decrease in the mechanical properties of the alloy.Since the Al-11Si aluminum alloy with 1.2wt.%Ni and 0.6wt.%formed a Chinese character-shaped Fe-rich enhanced phase,the high-temperature tensile property of the alloy was significantly improved.The ultimate tensile strength(UTS)of the Al-11 Si aluminum alloy reached 139 MPa at the test temperature of 350℃.

Al-11Si aluminum alloyNi contentFe contentFe-rich phasemechanical property

刘清、王若超、晁延吉、齐志峰、刘洪涛

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山东城市建设职业学院基础部,山东 济南 250103

山东商业职业技术学院,山东 济南 250103

齐鲁医药学院,山东淄博 255300

齐鲁工业大学(山东省科学院),山东省科学院新材料研究所,山东省轻质高强金属材料重点实验室,山东济南 250014

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Al-11Si铝合金 Ni含量 Fe含量 富Fe相 力学性能

山东省重点研发计划山东省自然科学基金

2021SFGC1001ZR2021ME250

2024

轻金属
沈阳铝镁设计研究院

轻金属

影响因子:0.358
ISSN:1002-1752
年,卷(期):2024.(4)
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