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首页> 外文期刊>Materials Science and Engineering >In-depth study of the mechanical properties for Fe_3Al based iron aluminide fabricated using the wire-arc additive manufacturing process
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In-depth study of the mechanical properties for Fe_3Al based iron aluminide fabricated using the wire-arc additive manufacturing process

机译：线弧添加制造工艺制备的Fe_3Al基铝化铁的机械性能的深入研究

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摘要

An innovative wire-arc additive manufacturing (WAAM) process is used to fabricate iron aluminide alloy in-situ, through separate feeding of pure Fe and Al wires into a molten pool that is generated by the gas tungsten arc welding (GTAW) process. This paper investigates the morphologies, chemical compositions and mechanical properties of the as-fabricated 30 at% Al iron aluminide wall components, and how these properties vary at different locations within the buildup wall. The tensile properties are also measured in different loading orientations; as epitaxial growth of large columnar grains is observed in the micro-structures. Fe_3Al is the only phase detected in the middle buildup section of the wall structure, which constitutes the majority of the deposited material. The bottom section of the structure contains a dilution affected region where some acicular Fe_3AlC_(0.5) precipitates can be observed, induced by carbon from the steel substrate that was used for fabrication. The microhardness and chemical composition indicate relatively homogeneous material properties throughout the buildup wall. However, the tensile properties are very different in the longitudinal direction and normal directions, due to epitaxial growth of large columnar grains. In general, the results have demonstrated that the WAAM process is capable of producing full density in-situ-alloyed iron aluminide components with tensile properties that are comparable to powder metallurgy methods.
机译：通过将纯铁丝和铝丝分别供入由气体钨极电弧焊（GTAW）工艺生成的熔池中，采用了创新的线弧增材制造（WAAM）工艺原位制造铝化铁合金。本文研究了所制造的30 at％铝铁铝化物壁组件的形貌，化学成分和机械性能，以及这些性能如何在堆积壁内的不同位置发生变化。还可以在不同的加载方向上测量拉伸性能。因为在微观结构中观察到大柱状晶粒的外延生长。 Fe_3Al是在壁结构的中间堆积区中检测到的唯一相，该相占沉积材料的大部分。结构的底部包含一个稀释影响区域，在该区域中可以观察到一些针状Fe_3AlC_（0.5）沉淀物，这是由来自用于制造的钢基材中的碳引起的。显微硬度和化学成分表明整个堆积壁的材料性能相对均一。但是，由于大的柱状晶粒的外延生长，所以在纵向和法线方向上的拉伸性能差异很大。通常，结果表明，WAAM工艺能够生产具有与粉末冶金法相当的拉伸性能的全密度原位合金化铝化铁铁部件。

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  • 来源
    《Materials Science and Engineering》 |2016年第4期|118-126|共9页
  • 作者

    Chen Shen; Zengxi Pan; Dominic Cuiuri; Bosheng Dong; Huijun Li;

  • 作者单位

    Faculty of Engineering & Information Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

    Faculty of Engineering & Information Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

    Faculty of Engineering & Information Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

    Faculty of Engineering & Information Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

    Faculty of Engineering & Information Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;

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

    Iron aluminide; Ferrous alloy; Additive manufacturing; Welding; Mechanical properties;

    机译：铝化铁;黑色合金;添加剂制造;焊接;机械性能;

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