Computer simulation of working stress of heat treated steel specimen

• Autorzy: Smoljan B. , Iljkic D. , Smokvina Hanza S.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper, the prediction of working stress of quenched and tempered steel has been done. The working stress was characterized by yield strength and fracture toughness. The method of computer simulation of working stress was applied in workpiece of complex form. Design/methodology/approach: Hardness distribution of quenched and tempered workpiece of complex form was predicted by computer simulation of steel quenching using a finite volume method. The algorithm of estimation of yield strength and fracture toughness was based on steel hardness, HV. Yield strength and fracture toughness distributions have been predicted using the Hahn-Rosenfield approach. Findings:It can be concluded that working stress of quenched and tempered steel can be successfully predicted by proposed method. The further experimental investigations are needed for final verification of established model. Research limitations/implications: For efficient estimation of fracture toughness from hardness, additional data about microstructure are needed. Practical implications: Estimation of hardness distribution can be based on time, relevant for structure transformation, i.e., time of cooling from 800 to 500 şC (t8/5). The prediction of distribution of microstructure composition, yield strength, and fracture toughness, can be based on steel hardness. Originality/value: Hardness distribution is predicted by involving the results of simple experimental test, i.e., Jominy-test in numerical modelling of steel quenching.

Słowa kluczowe

EN

heat treatment; computer simulation; microstructure; yield strength; fracture toughness

PL

obróbka cieplna; symulacja komputerowa; mikrostruktura; wytrzymałość plastyczna; wytrzymałość na rozrywanie

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 34, nr 2
• Strony: 152--156
• Opis fizyczny: Bibliogr. 16 poz., rys., tabl.

Twórcy

autor

Smoljan B.

autor

Iljkic D.

autor

Smokvina Hanza S.

• Department of Materials Science and Engineering, Faculty of Engineering, University of Rijeka, Vukovarska 58, HR-51000 Rijeka, Croatia,

Bibliografia

• [1] L. A. Dobrzański, W. Sitek, The modelling of hardenability using neural networks, Journal of Materials Processing Technology 92-93 (1999) 8-14.
• [2] L. A. Dobrzanski, J. Trzaska, Application of Neural Networks to Forecasting the CCT diagrams, Journal of Materials Processing Technology 157-158 (2004) 107-113.
• [3] P. Bała, J. Pacyna, J. Krawczyk, The kinetics of phase transformations during tempering of Cr-Mo-V medium carbon steel, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 79-82.
• [4] J. Trzaska, L. A. Dobrzański, A. Jagieło, Computer programme for prediction steel parameters after heat treatment, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 171-174.
• [5] B. Smoljan, Prediction of Mechanical Properties and Microstructure Distribution of Quenched and Tempered Steel Shaft, Journal of Materials Processing Technology 175 (2006) 393-397.
• [6] B. Smoljan, The Calibration of the Heat Conductivity Coefficient in Mathematical Model of Steel Quenching, Proc. MicroCAD`99, Miskolc, Hungary, 1999.
• [7] B. Smoljan, The Calibration of the Mathematical Model of Steel Quenching, Proceedings of the 5th World Seminar on Heat Treatment and Surface Engineering, Isfahan, Eds. M. Salehi, ISSST and IFHT 1, 1995, 709-715.
• [8] S. Patankar, Numerical Heat Transfer and Fluid Flow, McGraw Hill Book Company, New York, 1980.
• [9] B. Smoljan, Numerical simulation of as-quenched hardness in a steel specimen of complex form, Communications in Numerical Methods in Engineering 14 (1998) 277-285.
• [10] B. Smoljan, S. Smokvina Hanza, D. Iljkic, G. E. Totten, I. Felde, Computer simulation of mechanical properties of steel dies, Proceedings of the 2nd International Conference on Heat Treatment and Surface Engineering of Tools and Dies, Ljubljana, Slovenia, 2008, 154-155.
• [11] B. Lišcic, T. Filetin, Computer-aided Determination of the Process Parameters for Hardening and Tempering Structural Steels, Heat Treatment of Metals 3 (1987) 62-66.
• [12] T. Filetin, B. Lišcic, J. Galinec, New Computer-aided Method for Steel Selection based on Hardenability, Heat Treatment of Metals 3 (1996) 63-66.
• [13] B. Smoljan, Computer Simulation of Microstructure Trans-formation during the Quenching, Proc. 1st Int. Surface Eng. Congress and 13th IFHTSE Congress, ASM International, 2003, 353-356.
• [14] B. Smoljan, M. Butković, Simulation of Mechanical Properties of Hardened Steel, Proceedings of the MicroCAD ’98, Miskolc, Hungary, 1998, 3-9.
• [15] B. Smoljan, Numerical simulation of steel quenching, Journal of Materials Engineering and Performance 11/1 (2002) 75-80.
• [16] Fracture Mechanics Properties of Carbon and Alloy Steels. In section 5: Fatigue and Fracture Resistance of ferrous Alloys. ASM Handbook 19, Fatigue and Fracture, Material Park, OH: ASM International, 1996.