稀土钕对亚共晶铝硅合金组织及性能的影响
Effect of Rare Earth Element Nd on the Microstructures and Properties of Hypoeutectic Al-Si Alloy
摘 要
以中间合金的方式向亚共晶铝硅合金ZL101中添加不同含量的稀土钕进行变质处理, 研究了变质前后合金的组织、力学性能、拉伸断口形貌及物相组成。结果表明: 稀土钕对ZL101合金具有变质作用, 随钕含量的增加合金的硬度、强度及伸长率均先升后降, 钕添加量为0.3%时变质效果最佳, 合金硬度、抗拉强度及伸长率分别达到72 HBS, 190 MPa, 2.9%; 添加钕后合金拉伸断口中有韧窝出现; 钕含量达到0.4%时, 合金中生成的化合物相为Al8Si8MgNd2。
变质
显微组织
力学性能
钕
Al alloy
modification
microstructure
mechanical property
Nd
Abstract
Different contents of Nd were added into the hypoeutectic Al-Si alloy ZL101 in the form of master alloy for modification. The microstructure, mechanical properties, tensile fracture morphology and phase composition of alloys before and after being modified were investigated. The results indicate that ZL101 alloy was modified by the addition of Nd; the hardness, tensile strength and elongation of the modified alloy were increased first and then decreased, the optimum mechanical properties with hardness of 72 HBS, tensile strength of 190 MPa and elongation of 2.9% were achieved when 0.3wt% Nd was added into the alloy; and dimples were observed in the tensile fracture morphology; Nd compound phase, Al8Si8MgNd2, formed when the content of Nd was 0.4wt%.
中图分类号 TG146.2
所属栏目 试验研究
基金项目 江苏省产学研联合创新资金前瞻性联合研究项目(BY2011101)
收稿日期 2011/10/24
修改稿日期 2012/7/22
网络出版日期
作者单位点击查看
备注檀廷佐(1987-), 男, 安徽安庆人, 硕士研究生。
引用该论文: TAN Ting-zuo,YAO Zheng-jun,YUAN Can,XU Jun,WEI Dong-bo. Effect of Rare Earth Element Nd on the Microstructures and Properties of Hypoeutectic Al-Si Alloy[J]. Materials for mechancial engineering, 2012, 36(11): 36～40
檀廷佐,姚正军,袁灿,徐军,魏东博. 稀土钕对亚共晶铝硅合金组织及性能的影响[J]. 机械工程材料, 2012, 36(11): 36～40
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】SEBAIE O E, SAMUEL A M, SAMUEL F H, et al. The effects of mischmetal, cooling rate and heat treatment on the eutectic Si particle characteristics of A319.1, A356.2 and A413.1 Al-Si casting alloys[J].Materials Science and Engineering:A, 2008, 480(1/2):342-355.
【2】RAVI M, PILLAI U T S, PAI B, et al. A study of the influence of mischmetal additions to Al-7Si-0.3Mg(lm25/356) alloy[J].Metallurgical and Materials Transactions A, 1996, 27(5):1283-1292.
【3】PRASADA RAO A K, DAS K, MURTY B S, et al. Effect of grain refinement on wear properties of Al and Al-7Si alloy[J].Wear, 2004, 257:148-153.
【4】YASMIN T, KHALID A A, HAQUE M M. Tribological (wear) properties of aluminum-silicon eutectic base alloy under dry sliding condition[J].Journal of Materials Processing Technology, 2004, 153:833-838.
【5】TSAI Y C, CHOU C Y, LEE S L, et al. Effect of trace La addition on the microstructures and mechanical properties of A356(Al-7Si-0.35Mg) aluminum alloys[J].Journal of Alloys and Compounds, 2009, 487:157-162.
【6】LI B, WANG H, JIE J, et al. Effects of yttrium and heat treatment on the microstructure and tensile properties of Al-7.5Si-0.5Mg alloy[J].Materials and Design, 2011, 32(3):1617-1622.
【7】NOGITA K, YASUDA H, YOSHIYA M, et al. The role of trace element segregation in the eutectic modification of hypoeutectic Al-Si alloys[J].Journal of Alloys and Compounds, 2010, 489:415-420.
【8】PRUKKANON W, SRISUKHUMBOWORNCHAI N, LIMMANEEVICHITR C. Modification of hypoeutectic Al-Si alloys with scandium[J].Journal of Alloys and Compounds, 2009, 477:454-460.
【9】EMADI D, RAO A K P, MAHFOUD M. Influence of scandium on the microstructure and mechanical properties of A319 alloy[J].Materials Science and Engineering: A, 2010, 527(23):6123-6132.
【10】PRUKKANON W, SRISUKHUMBOWORNCHAI N, LIMMANEEVICHITR C. Influence of Sc modification on the fluidity of an A356 aluminum alloy[J].Journal of Alloys and Compounds, 2009, 487:453-457.
【11】NOGITA K, KNUUTINEN A, MCDONALD S, et al. Mechanisms of eutectic solidification in Al-Si alloys modified with Ba, Ca, Y and Yb[J].Journal of Light Metals, 2001, 1(4):219-228.
【12】SRIRANGAM P, KRAMER M J, SHANKAR S. Effect of strontium on liquid structure of Al-Si hypoeutectic alloys using high-energy X-ray diffraction[J].Acta Materialia, 2011, 59(2):503-513.
【13】LU S Z, HELLAWELL A. The mechanism of silicon modification in aluminum-silicon alloys: Impurity induced twinning[J].Metallurgical and Materials Transactions A, 1987, 18(10):1721-1733.
【14】LI B, WANG H, JIE J, et al. Microstructure evolution and modification mechanism of the ytterbium modified Al-7.5%Si-0.45%Mg alloys[J].Journal of Alloys and Compounds, 2010, 509:3387-3392.
【2】RAVI M, PILLAI U T S, PAI B, et al. A study of the influence of mischmetal additions to Al-7Si-0.3Mg(lm25/356) alloy[J].Metallurgical and Materials Transactions A, 1996, 27(5):1283-1292.
【3】PRASADA RAO A K, DAS K, MURTY B S, et al. Effect of grain refinement on wear properties of Al and Al-7Si alloy[J].Wear, 2004, 257:148-153.
【4】YASMIN T, KHALID A A, HAQUE M M. Tribological (wear) properties of aluminum-silicon eutectic base alloy under dry sliding condition[J].Journal of Materials Processing Technology, 2004, 153:833-838.
【5】TSAI Y C, CHOU C Y, LEE S L, et al. Effect of trace La addition on the microstructures and mechanical properties of A356(Al-7Si-0.35Mg) aluminum alloys[J].Journal of Alloys and Compounds, 2009, 487:157-162.
【6】LI B, WANG H, JIE J, et al. Effects of yttrium and heat treatment on the microstructure and tensile properties of Al-7.5Si-0.5Mg alloy[J].Materials and Design, 2011, 32(3):1617-1622.
【7】NOGITA K, YASUDA H, YOSHIYA M, et al. The role of trace element segregation in the eutectic modification of hypoeutectic Al-Si alloys[J].Journal of Alloys and Compounds, 2010, 489:415-420.
【8】PRUKKANON W, SRISUKHUMBOWORNCHAI N, LIMMANEEVICHITR C. Modification of hypoeutectic Al-Si alloys with scandium[J].Journal of Alloys and Compounds, 2009, 477:454-460.
【9】EMADI D, RAO A K P, MAHFOUD M. Influence of scandium on the microstructure and mechanical properties of A319 alloy[J].Materials Science and Engineering: A, 2010, 527(23):6123-6132.
【10】PRUKKANON W, SRISUKHUMBOWORNCHAI N, LIMMANEEVICHITR C. Influence of Sc modification on the fluidity of an A356 aluminum alloy[J].Journal of Alloys and Compounds, 2009, 487:453-457.
【11】NOGITA K, KNUUTINEN A, MCDONALD S, et al. Mechanisms of eutectic solidification in Al-Si alloys modified with Ba, Ca, Y and Yb[J].Journal of Light Metals, 2001, 1(4):219-228.
【12】SRIRANGAM P, KRAMER M J, SHANKAR S. Effect of strontium on liquid structure of Al-Si hypoeutectic alloys using high-energy X-ray diffraction[J].Acta Materialia, 2011, 59(2):503-513.
【13】LU S Z, HELLAWELL A. The mechanism of silicon modification in aluminum-silicon alloys: Impurity induced twinning[J].Metallurgical and Materials Transactions A, 1987, 18(10):1721-1733.
【14】LI B, WANG H, JIE J, et al. Microstructure evolution and modification mechanism of the ytterbium modified Al-7.5%Si-0.45%Mg alloys[J].Journal of Alloys and Compounds, 2010, 509:3387-3392.
相关信息
