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Fracture Behavior of Inconel 718 at High Temperature

机译：Inconel 718在高温下的断裂行为

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摘要

The effect of heat treatment on tensile and creep properties of nickel-base superalloy, Inconel 718 in room and at high temperature was investigated. Solution treatment was applied on the as-received material at 980℃ for 1 hour before water quenched followed by double aging treatments at 720℃ and 621℃ for 8 hours, respectively and then cooled in air. The tensile strength at elevated temperatures of 550℃ and 650℃ were slightly deteriorated for heat treated and as-received materials. Beside strength, significant difference was observed in the elongation. The elongation of heat treated samples drastically reduced to 4 to 5% only compared to that of the as received materials which exhibited more than 30% elongation. The significant increased in tensile strength is suspected due to the present of γ',γ" and 8 precipitates which pinned the movement of grain boundary and sliding. However, the present of these precipitates caused the material to become harder and brittle. Moreover, the increase in load from 70% to 90% UTS and in
机译：研究了热处理对室内和高温镍基高温合金Inconel 718的拉伸和蠕变性能的影响。对原样在980℃进行固溶处理1小时，然后水淬，然后分别在720℃和621℃进行两次时效处理8小时，然后在空气中冷却。热处理后的材料在550℃和650℃的高温下的拉伸强度略有下降。除了强度，在伸长率上观察到显着差异。热处理后的样品的伸长率仅比收到的材料显示出超过30％的伸长率大幅度降低到4％至5％。可能是由于存在γ'，γ”和8个析出物，阻止了晶界的移动和滑动，从而使抗拉强度显着增加。但是，这些析出物的存在使材料变得更硬和变脆。将负载从70％的UTS增加到90％

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  • 来源
    《Fracture and strength of solids VII》|2010年|p.1244-1249|共6页
  • 会议地点 Kuala Lumpur(MY);Kuala Lumpur(MY)
  • 作者

    O.Bapokutty; Z.Sajuri; J.Syarif; A.R. Said;

  • 作者单位

    Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Bangi, Selangor, Malaysia;

    Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Bangi, Selangor, Malaysia;

    Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Bangi, Selangor, Malaysia;

    Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Bangi, Selangor, Malaysia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料一般性问题;
  • 关键词

    Heat treatment; tensile; creep; fracture surface; microstructure; Inconel 718;

    机译：热处理;拉伸蠕变;断裂面微观结构铬镍铁合金718;

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