Study of creep crack growth in steels working under high temperatures

• Autorzy: Mateiu, H. , Fleşer, T.
• Konferencja: Konferencja mechaniki pękania / sympozjum (X ; 11-14.09.2005 ; Opole-Wisła, Polska)
• Języki publikacji: EN

Abstrakty

EN

This paper presents experimental results of creep crack propagation performed on specimens sampled from welded joints on pipes made out of heat resistant steels. The experimental system is a solution developed by ISIM Timişoara. The operating mode is described. Processing is computer controlled and allows the acquisition of experimental data. The heating system of the specimen, in isothermal regime, uses halogen lamps, which leads to the temperature control as stipulated in the testing standard. Results are given as dependence diagrams of the creep crack growth rate depending on the CT parameter.

Słowa kluczowe

EN

creep crack; steel

• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2005
• Tom: z. 82
• Strony: 83-90
• Opis fizyczny: Bibliogr. 10 poz., ilustr., wykr.

Twórcy

autor

Mateiu, H.

• National Institut for Welding and Material Testing-ISIM-Timişoara, Romania

autor

Fleşer, T.

• "POLITEHNICA" University Timişoara, Romania

Bibliografia

• [1] ASTM E 1457-92: Standard Test Method for Measurement of Creep Crack Growth Ratio in Metals. Annual Book in ASTM Standards.
• [2] ASTM E 647-98: Standard Test Method for Measurement of Fatigue Crack Growth Rates. Annual Book of ASTM Standards.
• [3] ASTM E 1681-95: Standard Test Method for determining of Treshold Stress Factor for Environment Assisted Cracking of Metalic Material - Under Constant Load. In: Annual Book of ASTM Standardsvol 03.01.
• [4] CIOCLOV D.: Mecanica ruperii materialelor. Editura Academiei Romane, Bucuresti, 1997.
• [5] Published Document PD 6539:1994. Guide to Methode for the Assessment of the Influence of Crack Growth on the Significance of Defects in Components Operating at High Temperatures. BSI 1994.
• [6] Published Document PD 6493:1991. Guidance on Methods for Assessing the Acceptability of Flaws in Fusion Welded Structures. BSI, 1991.
• [7] TADA, H. , et al.: The Stress Analysis of Cracks Handbook. Second Edition. Paris Productions Inc., 1985.
• [8] MURAKAMI, Y.: Stress Intensity Factor Handbook. (2 vol.) Perg. Press 1987.
• [9] BRINKMAN, C, R., et al.: Time Dependent Strain Controlled Fatigue Behavior of Annealed 21/4CrlMo Steel for Use in Nuclear Steam Generator Design. Journal of Nuclear Materials, 1976, vol. 62, p. 181.
• [10] MATEIU, H., et al.: Instalatii de incercare care caracterizeaza propagarea fisurii in conditii de fluaj si oboseala. Sudura ASR, Timisoara 2001, no.3.