FATIGUE LIFE AND FATIGUE CRACK GROWTH OF ODS NICKEL-BASE SUPERALLOY PM 1000

机译：ODS镍基超级合金PM 1000的疲劳寿命和疲劳裂纹扩展

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Fatigue crack growth (FCG) and fatigue life (LCF and HCF) of the oxide dispersion strengthened (ODS) nickel-base superalloy PM 1000 have been studied at 850℃ and 1000℃ on strongly textured bar and sheet material. In the HCF range, shorter lives were observed for <100>-specimens as compared to <110> ones, whereas in the LCF range longer lives were found for <100>-specimens. The FCG threshold was found to be higher in the <110> direction as compared to <100> direction. This anisotropy of the fatigue properties closely reflects the orientation dependence of Young's modulus and strength level. As shown by supplementary experiments on coarse elongated grained PM 3030 at 850℃, significantly enhanced fatigue properties could be achieved by additional □ '-hardening.

机译：研究了氧化物分散增强（ODS）镍基高温合金PM 1000在强纹理棒材和板材上的疲劳裂纹扩展（FCG）和疲劳寿命（LCF和HCF）在850℃和1000℃的情况。在HCF范围内，与<110>相比，<100>标本的寿命较短，而在LCF范围内，<100>-标本的寿命更长。发现在<110>方向上的FCG阈值高于<100>方向。疲劳特性的这种各向异性紧密反映了杨氏模量和强度水平的取向依赖性。如在850℃下对粗拉长颗粒PM 3030进行的补充实验所示，通过额外的□'-淬火可以显着增强疲劳性能。

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来源
《Eighth International Fatigue Congress Vol.5, Jun 3-7, 2002, Stockholm, Sweden》|2002年|p.3455-3462|共8页
会议地点 Stockholm(SE);Stockholm(SE)
作者
A. Boehm; M. Nganbe; H.-J. Klauss; M. Heilmaier; M. Schaper;
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作者单位

University of Technology Dresden, Institute of Materials Science, D-01062 Dresden, Germany;

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原文格式 PDF
正文语种 eng
中图分类一般工业技术;
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FATIGUE LIFE AND FATIGUE CRACK GROWTH OF ODS NICKEL-BASE SUPERALLOY PM 1000

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