Study on deformation-induced damage evolution for Inconel718 superalloy with the use of an innovative single-specimen method

• Autorzy: Socha G. , Madejski B. , Malicki M.

Identyfikatory

DOI

10.15632/jtam-pl.54.4.1379

• Języki publikacji: EN

Abstrakty

EN

An innovative method for investigation of deformation-induced damage of elastic-plastic materials is proposed. A static tension test, performed on a specimen with a variable cross- -section gage part enabled analysis of degradation of the material structure for all stages of permanent deformation. Modified Johnson model has been used to quantify damage. Analysis of the damage of the specimen surface as well as observations of the damage induced inside the gage part of the specimen has been performed using SEM observations. Debonding at the interface between a hard inclusion and a ductile matrix has been found to be responsible for initiation of cracks on the specimen surface as well as inside the gage part of the specimen. Analysis of the subsequent void growth has been performed. Surface cracks are associated with plastic deformation resulting in an increase of the surface roughness. Variations of the specimen surface roughness have been found to be in good correlation with the damage parameter. This correlation enables the use of surface roughness as the relative damage indicator for the investigated material and deformation mode.

Słowa kluczowe

EN

damage; accumulated plastic strain; superalloy; void growth

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2016
• Tom: Vol. 54 nr 4
• Strony: 1379--1390
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Socha G.

• Institute of Aviation, Warszawa, Poland

autor

Madejski B.

• Institute of Aviation, Warszawa, Poland

autor

Malicki M.

• Institute of Aviation, Warszawa, Poland

Bibliografia

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• 11. Shen J., Mao J., Boileau J., Chow C.L., 2014, Material damage evaluation with measured microdefects and multiresolution numerical analysis, International Journal of Damage Mechanics, 23, 4, 537-566
• 12. Socha G., 2003, Experimental investigations of fatigue cracks nucleation, growth and coalescence in structural steel, International Journal of Fatigue, 25, 2, 139-147
• 13. Socha G., 2004, Prediction of the fatigue life on the basis of damage progress rate curves, International Journal of Fatigue, 26, 4, 339-347
• 14. Socha G., Dietrich L., 2012, Accumulation of damage in A336 GR5 structural steel subject to complex stress loading, Strain, 48, 279-285
• 15. Socha G., Dietrich L., 2014, A fatigue damage indicator parameter for P91chromiummolybdenum alloy steel and fatigue pre-damaged P54T carbon steel, Fatigue and Fracture of Engineering Materials and Structures, 37, 195-205
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• 17. Socha G., Madejski B., Krysztofik J., Czarnewicz S., 2014, Test method of structural damages caused by permanent deformation of the alloy in the test sample by tensile test and the sample to test damage of the alloy structure, Patent pending no. P-409294, Urząd Patentowy RP
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• 20. Zhang M., Yang P., Tan Y., 1999, Micromechanisms of fatigue crack nucleation and short crack growth in a low carbon steel under low cycle impact fatigue loading, International Journal of Fatigue, 21, 823-830

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniajacą naukę.