Project detail

Effect of Impurity Embrittlement and Microstructurally Induced Shielding on Crack Stability and Growth Resistance in Low Alloy Steels

Duration: 01.01.1998 — 31.12.2001

Funding resources

Ministerstvo školství, mládeže a tělovýchovy ČR - COST

- whole funder

On the project

Description in English
Fracture toughness tests of steels can yield an important information about the cohesive strength of grain boundaries in case of intergranular fracture mode. Current evaluation methods, however, completely ignore the micro-tortuosity of the crack front.Related shielding effects might substantially reduce the real crack driving force in comparison with the standardly assumed straight crack front.The aim of the project is to develop a methodology for estimation of the shielding level for 2D- and 3D intergranular crack front branches. This correction would enable to reduce the data scatter band and to obtain a more relevant information on the grain boundary properties. Using this method, experimental data obtained from fracture toughness-, stress corosion cracking- and fatigue tests will be evaluated for various (mostly low alloy) steels, An analysis of impurity concentrations at grain boundaries will also be performed.

Mark

OC 517.30

Default language

Czech

People responsible

Pokluda Jaroslav, prof. RNDr., CSc. - principal person responsible

Units

Faculty of Mechanical Engineering
- (1998-01-01 - 2001-12-31)

Results

ŠANDERA, P., HORNÍKOVÁ, J., POKLUDA, J. Effective Stress Intensity Factor of a Real-Like 3D Intergranular Crack Front. In ECF 12, Fracture from Defects. UK, Sheffield: Elsevier, 1998. p. 811 ( p.)ISBN: 190153703.
Detail

POKLUDA, J., SAXL, I., ŠANDERA, P., PONÍŽIL, P., MATOUŠEK, M., PODRÁBSKÝ, T., HORNÍKOVÁ, J. Real-like Polycrystal with Intergranular Crack. In Euromat 2000. Tours (Francie): Elsevier, 2000. p. 449 ( p.)ISBN: 0-08-042815-0.
Detail

POKLUDA, J., VLACH, B., ŠANDERA, P., JURÁŠEK, L. Contradiction in Fracture- and Notch Toughness of High Purity Low Alloy Steels. In Cleaner Metal for Industrial Exploitation. Řež: Inst. Nuclear Research, 2001. p. 126 ( p.)ISBN: 92-828-8323-X.
Detail

HORNÍKOVÁ, J., ŠANDERA, P., POKLUDA, J. Effective Stress Intensity Factor for Crack of Intergranular Morphology. In Materials Structure & Micromechanics of Fracture (MSMF-3). Brno: Vutium, 2001. p. 737 ( p.)ISBN: 80-214-1892-3.
Detail

ŠANDERA, P., POKLUDA, J., HORNÍKOVÁ, J. Pyramidal Model of Intergranular Crack Front. In Materials Structure & Micromechanics of Fracture (MSMF-3). Brno: Vutium, 2001. p. 786 ( p.)ISBN: 80-214-1892-3.
Detail

POKLUDA, J., ŠANDERA, P., HORNÍKOVÁ, J. Kvantitativní interpretace závislosti rozkmitu prahových hodnot K-faktoru na střední velikosti zrna ARMCO železa. In Degradácia vlastností konštrukčných materiálov únavou. Žilina: ŽU Žilina, 2001. s. 31 ( s.)ISBN: 80-7100-873-7.
Detail

POKLUDA, J. Tortuous Cracks under Remote Mode I: the Statistical LEFM Approach. Zeszyty naukowe politechniki Opolskiej seria Mechanika, 2001, vol. 67, no. 7, p. 277 ( p.)ISSN: 1429-6055.
Detail

GORDIENKO, Y., ZASIMCHUK, E., POKLUDA, J. Multiscale Correlation Effects during Fatigue Damage Evolution Observed by Surface Roughness Analysis. In Materials Structure & Micromechanics of Fracture (MSMF-3). Brno: Vutium, 2001. p. 180 ( p.)ISBN: 80-214-1892-3.
Detail

DOBROVSKÁ, J., DOBROVSKÁ, V., POKLUDA, J., STRÁNSKÝ, K., MANDRINO, D., JENKO, M. Microheterogeneity in the Ultra-High Strength Low Alloy Steel after Three Regimes of Heat-Treatment. In Materials Structure & Micromechanics of Fracture (MSMF-3). Brno: Vutium, 2001. p. 726 ( p.)ISBN: 80-214-1892-3.
Detail

POKLUDA, J., VLACH, B., ŠANDERA, P., JURÁŠEK, L. Antagonism in Fracture and Notch Toughness of UHSLA Steels. In Charpy Centenary Conference 2001. Les Fontelles: SF2M Les Fontelles, 2001. p. 465 ( p.)
Detail

POKLUDA, J., ŠANDERA, P., HORNÍKOVÁ, J. Statistical Model of Roughness Induced Crack Closure. In Fracture Mechanics: Applications and Challenges, ECF 13. San Sebastian: Elsevier, 2000. p. CD ( p.)
Detail

POKLUDA, J., VLACH, B., ŠANDERA, P., JANOVÁ, D., HORNÍKOVÁ, J. Fraktografická podpora interpretace anomálního vztahu lomové a vrubové houževnatosti ultrapevné oceli. In Fractography 2000. Košice: ÚMV SAV, 2000. s. 383 ( s.)ISBN: 80-968468-3-3.
Detail

PONÍŽIL, P.; SAXL, I.; DRUCKMÜLLER, M.; POKLUDA, J. Comparison of Real and Simulated Polycrystalline Grain Structures. Kovové materiály, 1998, vol. 36, no. 6, p. 409 ( p.)ISSN: 0023-432X.
Detail

ŠANDERA, P., HORNÍKOVÁ, J., POKLUDA, J. Aproximální výpočet stínícího efektu na čele interkrystalické trhliny pomocí pyramidálního modelu. In Křehký lom. Brno: ÚFM AV ČR, 2001. s. 69 ( s.)
Detail

Responsibility: Pokluda Jaroslav, prof. RNDr., CSc.