利用MMD?1型销盘式磨损试验机，采用OM、SEM和EDS研究不同负载对Sr变质ADC12合金的摩擦磨损性能的影响，并探究其与合金显微组织及力学性能的关系。结果表明：当添加0.05%Sr(质量分数)时，合金显微组织中共晶Si相以颗粒状或纤维状均匀分布在晶界，富铁相则呈短棒状，此时合金力学性能最佳，且同一负载下其磨损量和摩擦因数均最低。当负载为100N时，因受到严重挤压变形，合金表面氧化膜发生破坏；基体合金以塑性屈服和严重剥层磨损为主要磨损机理；而当Sr添加量为0.05%时，合金的磨损程度最低，以粘着磨损和磨粒磨损为主要磨损机理，其摩擦磨损性能最优异。
The effect of applied load on the friction and wear properties of Sr modified ADC12 alloys, and its relationship with microstructure and mechanical properties were investigated byMMD-1 pin-on-disc wear testing machine, OM, SEM and EDS. The results show that, in the microstructure of alloy modified with 0.05%Sr(mass fraction), eutectic Si phases distribute uniformly at grain boundaries in morphologies of particle-like or fiber-like, and shape of Fe-rich intermetallics transformsto short rod-like, giving rise mechanical properties to the highest. Also the alloy wear volume and friction coefficient reach to the lowest under invariable load. At 100N, oxide films on worn surface arebroken due to the serious extruded deformation. Plastic yielding and severe delamination are mainly in the matrix alloy, while adhesive and abrasive wear characterize in the modified alloy with 0.05%Sr. The wear degree of the latter one is the minimum, and its friction and wear properties are the optimal.
参考文献
| [1] | 饶远生;闫洪;胡志.Modification of eutectic silicon andβ-Al5FeSi phases in as-cast ADC12 alloys by using samarium addition[J].稀土学报（英文版）,2013(9):916-922. |
| [2] | 闫洪;李正华;黄昕.镧对ADC12铝合金固溶时效组织的影响[J].稀土,2013(5):1-5. |
| [3] | 胡志;闫洪;饶远生.稀土Sm元素对铸态Al-Si-Cu合金组织和力学性能的影响[J].中国有色金属学报（英文版）,2013(11):3228-3234. |
| [4] | M. Okayasu;K. Ota;S. Takeuchi;H. Ohfuji;T. Shiraishi.Influence of microstructural characteristics on mechanical properties of ADC12 aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2014:189-200. |
| [5] | S. A. Kori;T. M. Chandrashekharaiah.Studies on the dry sliding wear behaviour of hypoeutectic and eutectic Al-Si alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20071/6(1/6):745-755. |
| [6] | M. Timpel;N. Wanderka;R. Grothausmann.Distribution of Fe-rich phases in eutectic grains of Sr-modified Al-10 wt.% Si-0.1 wt.% Fe casting alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2013:18-25. |
| [7] | 王连登;朱定一;陈永禄;魏喆良;李秋菊;黄利光;宋伟;吴海彬.熔体温度处理及变质对Al-20％Si合金凝固组织的影响[J].中国有色金属学报,2011(9):2075-2083. |
| [8] | 李双寿;唐靖林;曾大本.Sr变质对A356合金细化效果的影响[J].铸造,2004(8):599-601. |
| [9] | Stuart D. McDonald;Kazuhiro Nogita;Arne K. Dahle.Eutectic nucleation in Al-Si alloys[J].Acta materialia,200414(14):4273-4280. |
| [10] | K. G. Basavakumar;P. G. Mukunda;M. Chakraborty.Influence of grain refinement and modification on dry sliding wear behaviour of Al-7Si and Al-7Si-2.5Cu cast alloys[J].Journal of Materials Processing Technology,20071/3(1/3):236-245. |
| [11] | Gang Liu;Guodong Li;Anhui Cai;Zhaoke Chen.The influence of Strontium addition on wear properties of Al-20 wt% Si alloys under dry reciprocating sliding condition[J].Materials & design,20111(1):121-126. |
| [12] | Liao HC.;Sun Y.;Sun GX..Correlation between mechanical properties and amount of dendritic alpha-Al phase in as-cast near-eutectic Al-11.6% Si alloys modified with strontium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20021/2(1/2):62-66. |
| [13] | Di Xu;Vinay Sriram;Vidvuds Ozolins;Jenn-Ming Yang;K.N. Tu;Gery R. Stafford;Carlos Beauchamp;Inka Zienert;Holm Geisler;Petra Hofmann;Ehrenfried Zschech.Nanotwin formation and its physical properties and effect on reliability of copper interconnects[J].Microelectronic engineering,200810(10):2155-2158. |
| [14] | P. Srirangam;S. Chattopadhyay;A. Bhattacharya.Probing the local atomic structure of Sr-modified Al-Si alloys[J].Acta materialia,2014:185-193. |
| [15] | Ali MAZAHERY;Mohsen Ostad SHABANI.搅拌铸造SiC颗粒增强铝基复合材料的组织与磨损性能[J].中国有色金属学报（英文版）,2013(07):1905-1914. |
| [16] | 陈聪聪;陈刚;严红革;苏斌.颗粒增强铝基梯度复合材料的摩擦磨损性能[J].中国有色金属学报,2011(6):1258-1264. |
| [17] | J. An;R. G. Li;Y. Lu;C. M. Chen;Y. Xu;X. Chen;L. M. Wang.Dry sliding wear behavior of magnesium alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20081/2(1/2):97-104. |
| [18] | H.R. Lashgari;A.R. Sufizadeh;M. Emamy.The effect of strontium on the microstructure and wear properties of A356-10%B_4C cast composites[J].Materials & design,20104(4):2187-2195. |
| [19] | D.K. Dwtvedi;T.S. Arjun;P. Thakur.Sliding wear and friction behaviour of Al-18% Si-0.5% Mg alloy[J].Journal of Materials Processing Technology,20043(3):323-328. |
| [20] | 朱学卫;王日初;王小锋;彭健.高硅铝合金的摩擦磨损性能?[J].功能材料,2015(8):8063-8066,8071. |
| [21] | Naing Naing Aung;Wei Zhou;Lennie E. N. Lim.Wear behaviour of AZ91D alloy at low sliding speeds[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20085/6(5/6):780-786. |
| [22] | Kaveh Meshinchi Asl;Afshin Masoudi;Farzad Khomamizadeh.The effect of different rare earth elements content on microstructure, mechanical and wear behavior of Mg–Al–Zn alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20107/8(7/8):2027-2035. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%