Dry Sliding Wear Behaviour of Rheocat Al-5.7si-2cu-0.3mg Alloy

  • Authors

    • M A. Abdelgnei
    • M Z. Omar
    • M J. Ghazali
    • Mohamed A. Gebril
    • M N. Mohammed
    2018-08-01
    https://doi.org/10.14419/ijet.v7i3.17.16620
  • Aluminum-Silicon alloy, cooling slope, wear resistance, wear mechanism

  • In this study, the effect of improved microstructure of Al-5.7Si-2Cu-0.3Mg alloys by using semisolid process on hardness and dry sliding wear behaviour were investigated. The microstructures of conventional cast alloy were totally dendritic, while in rheocasting the dendritic transfer to fine globular microstructures after using cooling slope casting. Tribological tests were carried out by using a pin-on-disc apparatus in dry sliding conditions. Wear tests were at low sliding speed 1ms-1 ,applied load at 50N and three different sliding distance (i.e., 1.8Km, 5.4Km and 9Km) respectively. An optical microscope and a scanning electron microscope were used to examine the microstructure and to understand the wear mechanism on the worn surface of both samples. The results showed that, the wear resistance of rheocast alloy was improved and higher than that those produce by conventional casting. The volume loss of rheocast alloy show reduction more than 18% at 1.8Km and 10% at 9Km compared to as-cast alloy. Moderate wear regimes were appeared in both alloys, according to the range of wear rate. The friction coefficient had increased due to increase in the contact point between pin and disc materials. The dominant wear mechanism for conventional and rheocasting alloys was adhesion wear and abrasive wear respectively.

     

     

  • References

    1. [1] Chong A, Lin Wu, Shu-sen Lu, Shu-lin Zeng, Jin-biao Ping (2016), Dry Sliding Wear Behavior of Rheocast Hypereutectic Al–Si Alloys With Different Fe Contents. Transactions of Nonferrous Metals Society of China 26(3), 665–675.

      [2] Dwivedi DK, (2010), Adhesive Wear Behaviour of Cast Aluminium-Silicon Alloys: Overview. Materials and Design 31(5), 2517–2531.

      [3] Birol Y (2007), A357 Thixoforming Feedstock Produced By Cooling Slope Casting, Journal of Materials Processing Technology 186(1), 94–101.

      [4] Taghavi F & Ghassemi A (2009), Study on the effects of the length and angle of inclined plate on the thixotropic microstructure of A356 aluminum alloy. Materials and Design 30(5), 1762–1767.

      [5] Spencer DB, Mehrabian R & Flemings MC (1972), Rheological Behavior of Sn-15 Pct Pb in the Crystallization Range. Metallurgical and Materials Transactions B 3(7), 1925–1932.

      [6] Yurko JA & Flemings MC (2002), Rheology and Microstructure of Semi-Solid Aluminum Alloys Compressed in the Drop-Forge Viscometer. Metallurgical and Materials Transactions A 33(8), 2737–2746.

      [7] Reddy TVS, Dwivedi DK & Jain NK (2009), Adhesive Wear of Stir Cast Hypereutectic Al-Si-Mg Alloy Under Reciprocating Sliding Conditions. Wear 266(1–2), 1–5.

      [8] Kandemir S, Weston DP & Atkinson HV (2013), Production of A356/TiB Nanocomposite Feedstock for Thixoforming by an Ultrasonic Method. Solid State Phenomena 192–193 (1), 66–71.

      [9] Jiang J, Atkinson HV & Wang Y (2017), Microstructure and Mechanical Properties of 7005 Aluminum Alloy Components Formed by Thixoforming. Journal of Materials Science and Technology 33(4), 379–388.

      [10] Parshizfard E & Shabestari SG (2011), An Investigation on the Microstructural Evolution and Mechanical Properties of A380 Aluminum Alloy During SIMA Process. Journal of Alloys and Compounds 509(40), 9654–9658.

      [11] Das P, Samanta SK, Bera S & Dutta P. (2016), Microstructure Evolution and Rheological Behavior of Cooling Slope Processed Al-Si-Cu-Fe Alloy Slurry, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 47(5), 2243—2256.

      [12] Alhawari MNMKS, Omar MZ, Ghazali MJ & Salleh MS (2015), Evaluation of The Microstructure and Dry Sliding Wear Behaviour of Thixoformed A319 Aluminium Alloy. Materials and Design 76 (1), 169–180.

      1. G99. (2000), Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus. ASM International.

      [13] Yasmin T, Khalid AA, & Haque MM (2004), Tribological (Wear) Properties of Aluminum-Silicon Eutectic Base Alloy Under Dry Sliding Condition. Journal of Materials Processing Technology 153–154 (1–3), 833–838.

      [14] Ali MKA, Xianjun H, Mai L, Qingping C, Turkson RF & Bicheng C (2016), Improving the tribological characteristics of piston ring assembly in automotive engines using Al2O3 and TiO2 nanomaterials as nano-lubricant additives. Tribology International 103(1), 540–554.

      [15] Wan S, Li D, Zhang G, Tieu AK & Zhang B (2017), Comparison of the Scuffing Behaviour and Wear Resistance of Candidate Engineered Coatings for Automotive Piston Rings. Tribology International 106(1), 10–22.

      [16] Lee KY, Ko KH, Kim JH, Kim GG & Kim SJ (2007), Effects of temperature and sliding distance on the wear behavior of austenitic Fe-Cr-C-Si hardfacing alloy. Tribology Letters 26(2), 131–135.

      [17] Prakash U, Prasad SLA & Ravindra HV (2015), Study of Parametric Influence on Dry Sliding Wear of Al-SiCp MMC using Taguchi Technique. Materials Today: Proceedings 2(4–5), 1825–1832.

      [18] Prabhudev MS, Auradi V, Venkateswarlu K, Siddalingswamy NH & Kori SA (2014), Influence of Cu Addition on Dry Sliding Wear Behaviour of A356 Alloy. Procedia Engineering 97, 1361–1367.

      [19] Van Thuong N, Zuhailawati H, Anasyida AS, Huy TD & Dhindaw BK (2016), Dry Wear Behavior of Cooling-Slope-Cast Hypoeutectic Aluminum Alloy. International Journal of Materials Research 107(6), 578–585.

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    A. Abdelgnei, M., Z. Omar, M., J. Ghazali, M., A. Gebril, M., & N. Mohammed, M. (2018). Dry Sliding Wear Behaviour of Rheocat Al-5.7si-2cu-0.3mg Alloy. International Journal of Engineering & Technology, 7(3.17), 38-42. https://doi.org/10.14419/ijet.v7i3.17.16620