Cite this article as:

Research Article

Effects of mechanical vibration on physical, metallurgical and mechanical properties of cast-A308 (LM21) aluminum alloy

+ Author Affiliations
  • Received: 6 June 2020Revised: 11 October 2020Accepted: 13 October 2020Available online: 14 October 2020
  • The present investigation deals with the improvement in microstructure, physical, and mechanical properties of die-cast A308 alloy subjected to mechanical vibration during solidification. The different frequencies (0, 20, 30, 40, and 50 Hz) at constant amplitude (31 μm) were employed using a power amplifier as the power input device. X-ray diffractometer, optical microscopy, and scanning electron microscopy were used to examine the morphological changes in the cast samples under stationary and vibratory conditions. Metallurgical features of castings were evaluated by ImageJ analysis software. The average values of metallurgical features, i.e., primary α-Al grain size, dendrite arm spacing (DAS), avg. area of eutectic silicon, aspect ratio, and percentage porosity were reduced by 34, 59, 56, 22, and 62% respectively at 30 Hz frequency compared to stationary casting. The mechanical tests of cast samples showed that yield strength, ultimate tensile strength, elongation, and microhardness were increased by 8, 13, 17, and 16%, respectively, at 30 Hz frequency compared to stationary casting. The fractured surface of tensile specimens exhibited mixed-mode fracture behavior due to the appearance of brittle facets, cleavage facets, ductile tearing, and dimple morphologies. The presence of small dimples showed some plastic deformation occurred before fracture.
  • 加载中
  •  

  • [1] Ali Shabani, Mohammad Reza Toroghinejad, and  Alireza Bagheri, Effects of intermediate Ni layer on mechanical properties of Al–Cu layered composites fabricated through cold roll bonding, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1604-9
    [2] Li Lin, Bao-shun Li, Guo-ming Zhu, Yong-lin Kang, and  Ren-dong Liu, Effects of Nb on the microstructure and mechanical properties of 38MnB5 steel, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1670-z
    [3] Tong-hua Liu, Wei Wang, Wen-jiang Qiang, and  Guo-gang Shu, Mechanical properties and kinetics of thermally aged Z3CN20.09M cast duplex stainless steel, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1666-8
    [4] Xiao-hui Ao, Shu-ming Xing, Bai-shui Yu, and  Qing-you Han, Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1602-y
    [5] Hong-xiang Li, Shi-kai Qin, Ying-zhong Ma, Jian Wang, Yun-jin Liu, and  Ji-shan Zhang, Effects of Zn content on the microstructure and the mechanical and corrosion properties of as-cast low-alloyed Mg–Zn–Ca alloys, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1628-1
    [6] Mustafa K. Ibrahim, E. Hamzah, Safaa N. Saud, E. N. E. Abu Bakar, and  A. Bahador, Microwave sintering effects on the microstructure and mechanical properties of Ti-51at%Ni shape memory alloys, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1406-5
    [7] Lavish Kumar Singh, Alok Bhadauria, Amirthalingam Srinivasan, Uma Thanu Subramonia Pillai, and  Bellambettu Chandrasekhara Pai, Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1476-4
    [8] Mohammadreza Khanzadeh Gharah Shiran, Gholamreza Khalaj, Hesam Pouraliakbar, Mohamma dreza Jandaghi, Hamid Bakhtiari, and  Masoud Shirazi, Effects of heat treatment on the intermetallic compounds and mechanical properties of the stainless steel 321-aluminum 1230 explosive-welding interface, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1519-x
    [9] Ji-hong Dong, Chong Gao, Yao Lu, Jian Han, Xiang-dong Jiao, and  Zhi-xiong Zhu, Microstructural characteristics and mechanical properties of bobbin-tool friction stir welded 2024-T3 aluminum alloy, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1392-7
    [10] Z. M. Sheggaf, R. Ahmad, M. B. A. Asmael, and  A. M. M. Elaswad, Solidification, microstructure, and mechanical properties of the as-cast ZRE1 magnesium alloy with different praseodymium contents, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1523-1
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Share Article

Article Metrics

Article views(496) PDF downloads(9) Cited by()

Proportional views

Effects of mechanical vibration on physical, metallurgical and mechanical properties of cast-A308 (LM21) aluminum alloy

  • Corresponding author:

    Siddharth Yadav    E-mail: siddharthy.rs.mec15@itbhu.ac.in

  • 1. Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, U.P., India
  • 2. Department of Metallurgical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, U.P., India

Abstract: The present investigation deals with the improvement in microstructure, physical, and mechanical properties of die-cast A308 alloy subjected to mechanical vibration during solidification. The different frequencies (0, 20, 30, 40, and 50 Hz) at constant amplitude (31 μm) were employed using a power amplifier as the power input device. X-ray diffractometer, optical microscopy, and scanning electron microscopy were used to examine the morphological changes in the cast samples under stationary and vibratory conditions. Metallurgical features of castings were evaluated by ImageJ analysis software. The average values of metallurgical features, i.e., primary α-Al grain size, dendrite arm spacing (DAS), avg. area of eutectic silicon, aspect ratio, and percentage porosity were reduced by 34, 59, 56, 22, and 62% respectively at 30 Hz frequency compared to stationary casting. The mechanical tests of cast samples showed that yield strength, ultimate tensile strength, elongation, and microhardness were increased by 8, 13, 17, and 16%, respectively, at 30 Hz frequency compared to stationary casting. The fractured surface of tensile specimens exhibited mixed-mode fracture behavior due to the appearance of brittle facets, cleavage facets, ductile tearing, and dimple morphologies. The presence of small dimples showed some plastic deformation occurred before fracture.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return