• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >The effect of postproduction heat treatment on γ-TiAl alloys produced by the GTAW-based additive manufacturing process
【24h】

The effect of postproduction heat treatment on γ-TiAl alloys produced by the GTAW-based additive manufacturing process

机译：后期热处理对基于GTAW的增材制造工艺生产的γ-TiAl合金的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Postproduction heat treatments were carried out on additively manufactured γ-TiAl alloys that were produced by using the gas tungsten arc welding (GTAW) process. The microstructural evolution and mechanical properties of both as-fabricated and heat-treated specimens were investigated to assess the effect of different heat treatment conditions, by using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Neutron Diffraction and tensile tests. The results indicated that heat treatment promotes the formation of the γ phase in the majority region after heat treatment at 1200 ℃ for 24 h, while a fully lamellar structure was formed in the near-substrate zone. The response to heat treatment at 1060 ℃/24 h was markedly different, producing a fine lamellar structure with differing sizes in the majority region and near-substrate zone. These various microstructural characteristics determined the mechanical properties of the heat-treated samples. The heat-treated samples at 1200 ℃/24 h exhibited lower UTS and microhardness values but higher ductility than the as-fabricated samples without heat treatment while the 1060 ℃/24 h heat treatment resulted in higher UTS and microhardness values but lower ductility. Due to the homogenous microstructure in the majority region after each postproduction heat treatment, the tensile properties were similar for both the build direction (Z) and travel direction (Y), thereby minimising the anisotropy that is exhibited by the as-fabricated alloy prior to heat treatment.
机译：对采用气钨极电弧焊（GTAW）工艺生产的增材制造的γ-TiAl合金进行了后期生产热处理。通过光学显微镜（OM），扫描电子显微镜（SEM），X射线衍射（XRD）研究了加工后和热处理后的样品的微观结构演变和力学性能，以评估不同热处理条件的影响。 ，中子衍射和拉伸试验。结果表明，在1200℃热处理24 h后，热处理促进了大部分区域γ相的形成，而在近衬底区域形成了完整的层状结构。在1060℃/ 24 h热处理的响应明显不同，在大部分区域和近基板区域产生了尺寸不同的精细层状结构。这些各种微观结构特征决定了热处理样品的机械性能。与未经热处理的预制样品相比，在1200℃/ 24 h热处理后的样品具有较低的UTS和显微硬度值，但具有较高的延展性；而在1060℃/ 24 h的热处理下，则具有较高的UTS和显微硬度值，但延展性较低。由于每次生产后热处理后大部分区域的组织均质，因此拉伸方向在构造方向（Z）和行进方向（Y）上都相似，从而最大程度地降低了合金在加工前的各向异性。热处理。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第7期|86-95|共10页
  • 作者

    Yan Ma; Dominic Cuiuri; Huijun Li; Zengxi Pan; Chen Shen;

  • 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;

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

    TiAl; Heat treatment; GTAW; Additive manufacturing; Microstructure; Mechanical properties;

    机译：TiAl;热处理;GTAW;添加剂制造;微观结构机械性能;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号