Development of flow stress of AISI H13 die steel in hard machining

Abstract

An approach was presented to characterize the stress response of workpiece in hard machining, accounting for the effect of the initial workpiece hardness in addition to temperature, strain and strain rate on flow stress in this paper. AISI H13 die steel was chosen to verify this methodology. The proposed flow stress model demonstrates a good agreement with experimental data. Therefore, the proposed model can be used to predict the corresponding flow stress-strain response of AISI H13 die steel with variation of the initial workpiece hardness in hard machining.

Keywords

flow stress / hard machining / finite element modeling / AISI H13 die steel

References

[1] Axinte D. A., Dewes R. C. Surface Integrity of Hot Work Tool Steel after High Speed Milling-experimental Data and Empirical Models[J]. J. Mater. Process. Technol., 2002, 127(2): 325-335.

[2] Tonshoff H. K., Arendt C., Amor R. B. Cutting of Hardened Steel[J]. Ann. CIRP, 2000, 49(2): 547-566.

[3] Urbanski J. P., Koshy P., Dewes R. C., . High Speed Machining of Moulds and Dies for Net Shape Manufacture[J]. Materials and Design, 2000, 21: 395-402.

[4] Yan Hong. Study on Key Technologies of Forming of Magnesium Alloy and High Speed Machining of AISI H13 Die Steel [D]. The Post-Doctoral Research Report at HuaZhong University of Science and Technology, 2004,2 (in Chinese)

[5] Poulachon G., Moisan A., Jawahir I. S. On Modelling the Influence of Thermo-mechanical Behavior in Chip Formation during Hard Turning of 100Cr6 Bearing Steel[J]. Ann. CIRP, 2001, 50(1): 31-36.

[6] Johnson G. R., Cook W. H. Fracture Characteristic of Three Metals Subjected to Various Strains, Strain-rate, Temperature and Pressure [J]. Eng. Fract. Mech., 1985, 21: 31-48.

[7] Bariani P. F., Bruschi S., Negro T. D. A New Constitutive Model for Hot Forging of Steels Taking into Account the Thermal and Mechanical History [J]. Annals of the CIRP, 2000, 49(1): 195-198.

[8] Jonas J. J. Plasticity of Metals at Finite Strain: Theory, Experiment and Computation [J]. Mat. Science and Eng., 1997, 46: 8-13.

[9] Huang Z., Lucas, . Modeling Wall Boundary Conditions in an Elasto-viscoplastic Material Forming Process[J]. Journal of Materials Processing Technology, 2000, 107(1–3): 267-275.

[10] Hu W. Experimental Strain-hardening Behaviors and Associated Computational Models with Anisotropic Sheet Metals[J]. Computational Materials Science, 2000, 18(3–4): 355-361.

[11] Shatla M., Kerk C., Altan T. Process Modeling in Machining, Part 1:Determination of Flow Stress Data [J]. Int. J. Mach. Tools Manuf., 2001, 41(10): 1511-1534.

[12] Ng E. G., Aspinwall D. K., Brazil D., . Modeling of Temperature and Forces when Orthogonally Machining Hardened Steel [J]. Int. J. Mach. Tools Manuf., 1999, 39(8): 885-903.

[13] Ng E. G., Aspinwall D. K. Modeling of Hard Part Machining [J]. J. Mater. Process. Technol., 2002, 127(2): 222-229.