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GRAIN REFINEMENT OF Al-Si HYPOEUTECTIC ALLOYS BY Al3Ti1B MASTER ALLOY AND ULTRASONIC TREATMENT

机译:Al3Ti1B母合金和超声处理细化Al-Si亚共晶合金

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摘要

Al-Si alloys are widely used in automotive and aerospace industries due to their excellent castability, high strength to weight ratio and good corrosion resistance. However, Si poisoning severely limits the degree of grain refinement with the grain size becoming larger as the Si content increases. Generally the effect of Si poisoning is reduced by increasing the amount of master alloy added to the melt during casting. However, an alternative approach is physical grain refinement through the application of an external force (e.g. mechanical or electromagnetic stirring, intensive shearing and ultrasonic irradiation). This work compares the grain refining efficiency of three approaches to the grain refinement of a range of hypoeutectic Al-Si alloys by (ⅰ) the addition of Al_3Ti1B master alloy, (ⅱ) the application of Ultrasonic Treatment (UT) and (ⅲ) the combined addition of Al_3Ti1B master alloy and the application of UT.
机译:Al-Si合金具有出色的可铸造性,高强度重量比和良好的耐腐蚀性,因此被广泛用于汽车和航空航天工业。然而,Si中毒严重限制了晶粒细化的程度,随着Si含量的增加,晶粒尺寸变大。通常,通过增加铸造过程中添加到熔体中的中间合金的量来减少Si中毒的影响。但是,另一种方法是通过施加外力(例如机械或电磁搅拌,强力剪切和超声辐照)来物理细化晶粒。这项工作通过(ⅰ)添加Al_3Ti1B中间合金,(ⅱ)超声波处理(UT)的应用和(ⅲ)三种方法对一系列次共晶Al-Si合金的晶粒细化的晶粒细化效率进行了比较。结合添加Al_3Ti1B中间合金和UT的应用。

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  • 来源
    《Shape casting》|2016年|143-150|共8页
  • 会议地点 Downtown Nashville TN(US)
  • 作者单位

    Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;

    Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;

    Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;

    Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;

    Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Grain refinement; Aluminium-silicon alloys; Ultrasonic treatment; Si poisoning;

    机译:晶粒细化;铝硅合金;超声波处理;硅中毒;

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