• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of tungsten concentration on microstructures of Co-10Ni-6Al-(0,2,4,6) W-6Ti (at%) cobalt-based superalloys
【24h】

Effect of tungsten concentration on microstructures of Co-10Ni-6Al-(0,2,4,6) W-6Ti (at%) cobalt-based superalloys

机译：钨浓度对Co-10Ni-6Al-（0,2,4,6）W-6Ti（at％）钴基高温合金显微组织的影响

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

The effects of reducing the W concentration (and concomitantly mass density) of Co-10Ni-6Al-xW-6Ti at% Co-based superalloys, with a γ(f.c.c) plus γ'(L1_2) microstructure, is investigated for a series of alloys with W concentrations of 6 at% (baseline alloy), 4 and 2 at% (W-reduced) and 0 at% (W-free). The γ'(L1_2) solvus temperature decreases strongly (by 46 ℃ per 1 at% reduction in W), while the liquidus and solvus temperatures decrease mildly (3-5 ℃ per 1 at% W reduction) as measured by differential scanning calorimetry. Scanning electron microscopy was used to image phase formation in all alloys. When aging at 900 or 1000 ℃ for 256 h, the W reduction does not result in the appearance of additional phases within the grains beyond the γ(f.c.c) and γ'(L1_2) phases present in the original alloy. Grain-boundary precipitates are present for all alloy compositions: W-rich or W-free precipitates after aging at 1000 ℃, and coarsened γ'(L1_2) precipitates after aging at 900 ℃. The composition of grain boundary precipitates were measured with energy-dispersive X-ray spectroscopy. Vickers microhardness values decrease with decreasing W content, due to a reduction in γ'(L1_2) precipitation and reduced solid-solution strengthening.
机译：研究了一系列具有γ（fcc）和γ'（L1_2）微结构的Co％Ni基Co-10Ni-6Al-xW-6Ti的Co-10Ni-6Al-xW-6Ti的W浓度降低（以及随之而来的质量密度）的影响。 W浓度为6 at％（基线合金），4和2 at％（降低W）和0 at％（无W）的合金。用差示扫描量热法测得，γ'（L1_2）的固溶线温度急剧降低（每降低1 at％W降低46℃），而液相线和固溶线温度则缓慢降低（每降低1 at％W降低3-5℃）。使用扫描电子显微镜对所有合金中的相形成进行成像。当在900或1000℃时效256 h时效时，W的减少不会导致晶粒内出现超过原始合金中γ（f.c.c）和γ'（L1_2）相以外的其他相。所有合金成分均存在晶界沉淀：在1000℃时效后富W或无W沉淀，在900℃时效后较粗的γ'（L1_2）沉淀。晶界析出物的组成通过能量色散X射线光谱法测定。维氏显微硬度值随着W含量的降低而降低，这是由于γ'（L1_2）沉淀的减少和固溶强化的降低。

著录项

  • 来源
    《Materials Science and Engineering》 |2017年第17期|481-486|共6页
  • 作者

    Peter J. Bocchini; Chantal K. Sudbrack; Daniel J. Sauza; Ronald D. Noebe; David N. Seidman; David C. Dunand;

  • 作者单位

    Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208-3108, USA;

    NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135, USA;

    Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208-3108, USA;

    NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135, USA;

    Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208-3108, USA,Northwestern University Center for Atom-Probe Tomography (NUCAPT), 2220 Campus Drive, Evanston, IL 60208-3108, USA,NanoAl LLC, Illinois Science + Technology Park, 8025 Lamon Ave, Suite 446, Skokie, IL 60077, USA;

    Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208-3108, USA,NanoAl LLC, Illinois Science + Technology Park, 8025 Lamon Ave, Suite 446, Skokie, IL 60077, USA;

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

    Cobalt alloys; Superalloy; Intermetallic; L1_2, grain boundary;

    机译：钴合金;高温合金金属间化合物L1_2;晶界;

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