한국해양공학회지 (Journal of Ocean Engineering and Technology)
- 제4권2호
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- Pages.262-262
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- 1990
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- 1225-0767(pISSN)
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- 2287-6715(eISSN)
12% Cr 강의 크리이프중 전위거동에 관한 연구
Study on the Dislocation Behavior during Creep in 12% Chromium Steel
- Oh, Sea-Wook (Donga University) ;
- Jang, Yun-Seok (Doosan Heavy Industries and Construction)
- 발행 : 1990.12.01
초록
In order to check the effect of dislocation behavior on creep rate in 12% Chromium steel, 14 samples of different compositions were examined by creep rupture test, and subgrain sizes, distribution of dislocations and precipitates were checked. And, authors reviewed the behaviors of dislocations, the formation and growth of subgrains and precipitates during creep. The results are as the following: 1) Creep rates calculated by .epsilon. over dot = .rho.bv show 10-15% higher values than actual data measured. However, authors conclude that the density and velocity of dislocations together with subgrain size are important factors governing deformation during creep in 12% chromium steel. 2) The values of the strength of obstacles in the mobility of dislocations are more clearly depended on the effective stress in the range of
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