The structure of austenitic steel AISI 316 after ECAP and low-cycle fatigue

• Autorzy: Greger M. , Vodárek V. , Dobrzański L. , Kander L. , Kocich R. , Kuřetová B.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The article presents results of investigation of structure and properties of austenitic steel grade AISI 316 after application of Equal Channel Angular Pressing (ECAP) at the temperature of approx. 290° C. Design/methodology/approach: The ECAP method led to significant improvement of strength of investigated material. Experiments were planned and realised at the temperature ranging from room temperature up to above mentioned temperature. Findings: It was established with use of the EBSD technique that after 8 passes through the ECAP die the sub-grains with an angle of disorientation smaller than 10° formed less than 20% of resulting structure. Average size of austenitic grains with high angle boundary after 8 passes was approx. 0.32 µm. It was proven that the ECAP method enables obtaining of ultra fine-grained austenitic structure formed by recrystallised grains with very low density of dislocations. Practical implications: The Technology ECAP was applied on austenitic steel AISI 316. It was verification of ECAP application possibility on steel AISI 316 importantly for following applying on similar kinds of steel, because ECAP technology influence on fatigue properties was confirmed. Originality/value: It can be predicted on the basis of obtained results that, contrary to low-cycle fatigue the ultra-fine grained material will manifest at fatigue load in the mode of constant amplitude of stress higher fatigue characteristics, particularly fatigue limit.

Słowa kluczowe

EN

structure; low-cycle fatigue; steel AISI 316; ECAP

PL

struktura; zmęczenie niskocyklowe; stal AISI 316; ECAP

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 28, nr 2
• Strony: 151--158
• Opis fizyczny: Bibliogr. 25 poz., wykr.

Twórcy

autor

Greger M.

autor

Vodárek V.

autor

Dobrzański L.

autor

Kander L.

autor

Kocich R.

autor

Kuřetová B.

• Faculty of Metallurgy and Materials Engineering, VŠB - Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava - Poruba, Czech Republic,

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