K-0530 Ni基単結晶超合金CMSX-2の高温疲労強度(S04-4 非鉄金属の組織と疲労特性)(S04 金属材料の組織と疲労強度信頼性)

• 大谷 隆一

  京大

• 多田 直哉

  岡山大

• 和田 淳秀

  京大院

書誌事項

タイトル別名

• K-0530 High Temperature Fatigue Strength of Ni-based Single-Crystalline Superalloy, CMSX-2

抄録

A nickel-based single-crystalline superalloy, CMSX-2 was investigated from the standpoint of high temperature fatigue strength. Three kinds of push-pull fatigue tests were conducted at 1000℃: (1) PP-test under a sinusoidal stress waveform of 1 Hz-frequency at stress amplitude of 300MPa, the number of cycles to rupture, N_f=8,234, (2) CC-test under a trapezoidal one with hold time in tension and compression of 600s each at stress amplitude of 250MPa, N_f=93, and (3) PP_<preCC>-test, which is PP-test carried out after removal of surface oxide film and small cracks generating during preceding CC-test for 47 cycles, N_f=4,318. A distinguished microstructural difference between PP and PP_<preCC> is that γ'-phase kept the initial cubic shape in PP but it changed to spherical in PP_<preCC>-Nearly 10%-increase in total strain range and 50%-decrease in fatigue life of PP_<preCC> as compared with pure PP-fatigue is attributable to the collapse of γ'-phase.

収録刊行物

• 年次大会講演論文集

  年次大会講演論文集 I.01.1 (0), 185-186, 2001

  一般社団法人 日本機械学会

キーワード

• Nickel-based Single-crystalline Superalloy
• High Temperature Fatigue
• Effect of Pre-creep
• γ'-phase

詳細情報

• CRID: 1390282681042859264
• NII論文ID: 110002526300
• DOI: 10.1299/jsmemecjo.i.01.1.0_185
• ISSN: 24331325
• Web Site: https://www.jstage.jst.go.jp/article/jsmemecjo/I.01.1/0/I.01.1_185/_pdf
• 本文言語コード: ja
• データソース種別:
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