Effect of Nitrogen on the High Temperature Creep Behavior of 9Cr-2Co Steel
スポンサーリンク
概要
- 論文の詳細を見る
Constant load creep tests were conducted at 873, 898 and 923 K under an initial stress of 50, 60 or 70 MPa to examine the effect of nitrogen addition (0.06, 0.11, 0.16 and 0.19 mass%) on the creep behavior of a 9mass%Cr-2mass%Co ferritic steel. Extraction residue analysis showed that 240 to 410 ppm of nitrogen was present as solid solution. The rest of the nitrogen existed as nitride precipitates. The creep rate decreased while creep rupture life increased with an increase in nitrogen content. It is also observed that the higher the nitrogen, the shorter the creep rupture strain. A state equation for creep could be represented as; ε0=<I>A</I>0σ<SUB>0</SUB><SUP>n</SUP>exp(-Q0/RT ), where ε0 is the imaginary initial strain rate defined in the text, A0 is a constant, n is the stress exponent and Q0 is the apparent activation energy. The mean values of n and Q0 were 4.5 and 360 kJ/mol, respectively. The Orowan stress for specimens crept at 873 K and 70 MPa was estimated from the measurement of mean interparticle spacing obtained by TEM study. The resultant values are 15, 22, 30 and 38 MPa for specimens containing 0.06, 0.11, 0.16 and 0.19 mass% nitrogen, respectively.
- 社団法人 日本鉄鋼協会の論文
- 1997-02-15
著者
-
MASUYAMA Fujimitsu
Nagasaki Research and Development Center, Mitsubishi Heavy Industries, Ltd.
-
Aoki H
Nippon Steel Corp. Kitakyushu Jpn
-
Masuyama Fujimitsu
Nagasaki Research And Development Center Mitsubishi Heavy Industries Ltd.
-
Masuyama Fujimitsu
Nagasaki Research & Development Center Mitsubishi Heavy Industries Ltd.
-
Endo Takao
Department Of Internal Medicine (section I) Sapporo Medical University School Of Medicine
-
Endo Takao
Department Of Mecanical Engineering And Material Science
-
Aoki Hajime
Yokohama National University
-
HARA Ken-ichiro
Yokohama National University, Tokiwadai
-
Hara Ken-ichiro
Yokohama National University Tokiwadai
-
Masuyama Fujimitsu
Nagasaki R&D Center, Mitsubishi Heavy Industries, Ltd.
関連論文
- Usefulness of narrow-band imaging endoscopy for diagnosis of Barrett's esophagus
- 3-Year Experience with 2.25 Cr-1.6 W(HCM2S) and 12Cr-0.4Mo-2W(HCM12A) Steel Tubes in a Power Boiler(
- PE-294 Unexpected Discontinuation of Antiplatelet Therapy in Elderly Patients Following Sirolimus-Eluting Stents Implantation(Coronary revascularization,PCI(11)(IHD),Poster Session(English),The 72nd Annual Scientific Meeting of the Japanese Circulation So
- Juvenile Polyposis Complicated with Protein Losing Gastropathy
- Influence of Excess Si on the Morphology and Thermal Stability of Metastable Precipitates Formed in an Al-Mg-Si Alloy
- A Case of Systemic Osteomyelitides Due to Mycobacterium avium
- Strain Enhanced Precipitate Coarsening during Creep of a Commercial Magnesium Alloy AZ80
- Creep Modeling for Life Evaluation of Heat-resistant Steel with a Martensitic Structure
- Continuously Cooled Microstructure and Creep Rupture Strength of Low C-2.25Cr-1.6W-V-Nb Steel
- Strain Enhanced Growth of Precipitates during Creep of T91
- Growth of Ultrathin Epitaxial 3C-SiC Films on Si(100) by Pulsed Supersonic Free Jets of CH_3SiH_3
- Microstructural Degradation of the HAZ in 11Cr-0.4Mo-2W-V-Nb-Cu Steel (P122) during Creep
- Deformation of Copper Single Crystals under Application of Ultrasonics
- Creep Damage Simulation Test and Creep Life Assessment System for Elevated Temperature Plant Components
- On the Decrease in Static Flow Stress by Superimposition of Ultrasonics
- Effect of Nitrogen on the High Temperature Creep Behavior of 9Cr-2Co Steel
- Change in Vickers Hardness and Substructure during Creep of a Mod.9Cr-1Mo Steel
- High Temperature Oxidation Behavior of High Nitrogen Ferritic Steels
- Difference of Late Gadolinium Enhancement on Cardiac Magnetic Resonance Imaging between Arrhythmogenic and Non-Arrhythmogenic Papillary Muscle: A Case Report