高張力4340鋼SCC破面近傍の残留応力分布に及ぼす電極電位の影響(<小特集>X線材料強度小特集)

フォーマット:

論文

責任表示:

津田, 政明 ; 広瀬, 幸雄 ; 矢島, 善次郎 ; 田中, 啓介

言語:

日本語

出版情報:

日本材料学会, 1988-06-15

著者名:

• 津田, 政明
• 広瀬, 幸雄
• 矢島, 善次郎
• 田中, 啓介

掲載情報:

材料=Journal of the Society of Materials Science, Japan

ISSN:

0514-5163      

巻:

37

通号:

417

開始ページ:

599

終了ページ:

605

バージョン:

publisher

概要:

金沢大学大学院自然科学研究科<br />stress corrosion cracking tests were conducted by using the compact tension (CT) specimens of 200℃ tempered AISI 4340 steel in a 3.5 % NaCl solution environment under various electrode potentials. The distribution … of the residual stress beneath the fracture surface was measured with the X-ray electron microscopy. The Effect of electrode potential on the growth kinetics of stress corrosion cracking was discussed on the bases of the results of X-ray observation and scanning microfractography. The results obtained are summarized as follows:(1) The residual stress measured on the fracture surface was tension under cathodic potential. It decreased with increasing potential, and changed to compression under anodic potential. (2) The relation between the plastic zone depth ω_y and the stress intensity factor K can be approximated by the following fracture mechanics equation:ω_y=α(K/σ_Y)^2 were σ_Y is the yield strength. The α value was 0.084 under the free corrosion condition and 0.053 under the catholic polarization condition. 続きを見る

URL:

http://hdl.handle.net/2297/12454