アルミニウム合金の疲労き裂進展に及ぼす真空ならびに気体環境の影響

• 駒井 謙治郎

  京都大学工学部

• 山地 謙二

  三菱重工業(株)

• 遠藤 吉郎

  京都大学工学部

書誌事項

タイトル別名

• Effect of Atmosphere on Fatigue Crack Propagation of Aluminum Alloy
• アルミニウム ゴウキン ノ ヒロウ キレツ シンテン ニ オヨボス シンクウ

抄録

The influence of gas atmosphere including vacuum on the fatigue crack growth rate da/dN has been investigated. da/dN decreased monotonically with decreasing partial pressure of water vapor pH₂O. This was attributed to hydrogen embrittlement due to the residual water vapor. Although oxidation is inhibited in a harder vacuum, the crack rate decreased slightly. The fatigue fracture toughness was minimum in moist air and increased monotonically with decreasing pH₂O. The fracture surface obtained in both moist or room air showed mostly a cleavage-like pattern and the facets of uneven crack surface were close to {100} orientation. In dry air, Ar and a vacuum of 10^-3Pa, clearly defined striations were observed, whilst in a harder vacuum striation-like patterns, extrusions and flat planes appeared. In dry air, Ar and vacuum, {100} crack planes with <110> crack tip direction were observed on almost 50% of the fracture surface. These results suggest the occurance of crack extension by an alternating shear proposed by Pelloux.

収録刊行物

• 材料

  材料 29 (317), 162-167, 1980

  公益社団法人 日本材料学会

キーワード

• 疲労き裂
• 環境効果
• フラクトグラフィ

詳細情報

• CRID: 1390001205391711744
• NII論文ID: 110002298187
• NII論文ID: 10003083261
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.29.162
• COI: 1:CAS:528:DyaL3cXhvVCls7g%3D
• ISSN: 18807488
• ISSN: 05145163
• ISSN: http://id.crossref.org/issn/05145163
• NDL書誌ID: 2169752
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2169752
• Web Site: https://search.jamas.or.jp/link/ui/1991009419
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可