Fatigue damage cumulation in brass under variable loading

• Autorzy: Mroziński S. , Dymski S.
• Języki publikacji: EN

Abstrakty

EN

In the paper there was presented the course of fatigue damage cumulation in specimens made of CuZn37 brass. During the analysis the course of damage cumulation there were used parameters of hysteresis loop and microstructure changes for different levels of fatigue damage, that were registered during the tests. Basing on the analysis of three hysteresis loop parameters (stress amplitude [...], plastic strain amplitude [...] and plastic strain energy \deltaWpl) it has been found that during variable loading the smallest changes are observed for the energy \deltaWpl. Microscopic analysis of brass specimens after various fatigue levels showed that fatigue damage cumulation is also visible in changes taking place both within grains and at their boundaries. These changes include the presence of failures at boundaries of grains and slide banding systems inside of them, which are typical for plastic strain of the material.

Słowa kluczowe

EN

damage cumulation; cyclic properties; fatigue damages

PL

kumulacja uszkodzeń; właściwości cykliczne; odlewnictwo

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 3
• Strony: 275--280
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Mroziński S.

autor

Dymski S.

• Department of Machine Design, Mechanical Engineering Faculty, University of Technology and Life Sciences, Kaliskiego 7, 85-796 Bydgoszcz, Poland,

Bibliografia

• [1] L. E. Tucker, 1972. A Procedure for Designing Against Fatigue Failure of Notched Parts. Society of Automotive Engineers, Inc., SAE Paper No 720265, New York.
• [2] ASTM E606-92: Standard Practice for Strain-Controlled Fatigue Testing.
• [3] PN-84/H-04334: Badania niskocyklowego zmęczenia metali.
• [4] S. Kocańda, A. Kocańda, 1989. Niskocyklowa wytrzymałość zmęczeniowa metali. PWN Warszawa 1989.
• [5] S. Kocańda, Zmęczeniowe pękanie metali. WNT, W-wa 1985.
• [6] S. Kocańda, D. Kocańda, Fraktografia. Badania mikrobudowy przełomów zmęczeniowych w latach 1954-2004, Przegląd Mechaniczny R.LXIV, Z1 (2005), 27-37.
• [7] J. W Wyrzykowski., E. Pleszakow, J. Sieniawski, Odkształcenie i pękanie metali, WNT, Warszawa 1999.
• [8] W. Ramberg, W. R. Osgood, Description of stress-strain curves by three parameters, NACA, Tech.Note, No. 402, 1943.