Fracture toughness determination of P91 steel according to ASTM E1820 and ISO 12135

• Autorzy: Konopik P. , Viehrig H. W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper attempts to discuss the problems associated with the determination of fracture toughness values for P91 steels according to the tests standards ASTM E1820 and ISO 12135. Design/methodology/approach: The most applied standards for fracture toughness values determination in the ductile region are ASTM E1820 and ISO 12135. Both standards are intended to determine fracture toughness values in the ductile region. However, there are remarkable differences which leads to different values of obtained fracture toughness parameters such as JIC or CTOD. Findings: Within this work the P91 steel was characterized by fracture mechanics and fracture toughness parameters according to the test standards ASTM E1820 and ISO 12135 were determined. It was shown that despite of the fact that both test standards are designed to provide engineering fracture toughness for ductile crack initiation the evaluated fracture toughness values differ strongly depending to the applied standard. Research limitations/implications: For establishing ultimate load limitations and assessing the integrity for a large number of engineering structures of multifarious types a fracture mechanic has attained a great attention. Originality/value: Fracture toughness is one of the most important mechanical properties.

Słowa kluczowe

EN

fracture toughness; J-R curve; unloading compliance; ASTM E1820; ISO 12135

PL

odporność na pękanie; krzywa J-R; ASTM E1820; ISO 12135

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 69, nr 2
• Strony: 64--68
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Konopik P.

• COMTES FHT a.s., Dobrany, Czech Republic

autor

Viehrig H. W.

• Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

Bibliografia

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• [2] J. Džugan, H.-W. Viehrig, Crack initiation deter- mination for 3-point bend specimens, Journal of Testing and Evaluation 35/3 (2007) 245-253.
• [3] J. Džugan, Y. Ito, J.S. Kwon, K. Ogawa, T. Shoji, Fracture toughness tests of wheelset materials used in the Japanese Shinkasen express trains, Journal of Materials Design and Applications 218 (2004) 263-271.
• [4] H.-W. Viehrig, J. Boehmert, J. Dzugan, Use of instrumented Charpy impact tests for the determination of fracture toughness values, European Structural Integrity Society 30 (2002) 245-252.
• [5] R L. Jones, J.R. Gordon, N.V. Challenger, A study of specimen size on J-R curve behaviour, Fatigue and Fracture of Engineering Materials & Structures 14/7 (1991) 777-788.
• [6] J. Džugan, H.-W. Viehrig, Application of the normalization method for the determination of J–R curves, Materials Science and Engineering A 387-389 (2004) 307-311.
• [7] P. Doig, R.F. Smith, P.E.J Flewitt, The use of stretch zone width measurements in the determination of fracture toughness of low strength steels, Engineering Fracture Mechanics 19 (1984) 653-664.
• [8] ASTM Standard E1820-119: Standard Test Method for Measurement of Fracture Toughness, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA, 2008.
• [9] ISO Standard 12135, Unified Method of Test for the Detremination of Quasistatic Fracture Toughness, Geneva, Switzerland, 2002.
• [10] ASTM E1823-07. Standard terminology relating to fatigue and fracture testing. Annual book of ASTM standards. West Conshohocken, PA: ASTM International; 2007.
• [11] J. Džugan, Corrected procedure for crack lengths calculation by the unloading compliance technique for Charpy size specimens, Journal of Testing and Evaluation 33/6 (2005) 433-438.