Material Characterization and Modeling of High Strength PM Steel


Article Preview

Powder Metallurgy (PM) component properties are influenced by the pore morphology, size, size-distribution and pore content [1]. Structural alloy Astaloy LH mechanical properties are characterized for density range 6.3 to 7.1 g/cm3. Porosity characterization of the material is also done using ASTM standard. In the first phase, an attempt is made to predict the tensile property using Gurson-Tvergaard-Needleman (GTN) model and FEM. The prediction is verified with tensile test results. It is observed that after fine tuning the parameters in the model, the prediction is found to be close to experimental values.



Edited by:

Prasad Yarlagadda, Yun-Hae Kim, Zhijiu Ai and Xiaodong Zhang




S. B. Mirajkar et al., "Material Characterization and Modeling of High Strength PM Steel", Advanced Materials Research, Vol. 337, pp. 766-769, 2011

Online since:

September 2011




[1] P.K. Johnson: Award winning P/M parts, J. Powder Metallurgy, Vol. 3 (1995), p.215–220.

[2] M. Kabatova, E. Dudrova and A. S. Wronski: Microcrack nucleation, growth, coalescence and propagation in the fatigue failure of a powder metallurgy steel, Fatigue and Fract. Eng. Mater. Struct. Vol. 32 (2009), p.214–222.


[3] Salak, in: Ferrous Powder Metallurgy, Cambridge International Science Publishing, Cambridge (1997), in press.

[4] N. Chawla, D. Babic, J.J. Williams, S.J. Polasik, M. Marucci and K.S. Narasimhan: Advances in Powder Metallurgy and Particulate Materials, Metal Powder Industries Federation (2002), p.104.

[5] J.I. Bluhm and R.J. Morrissey: Proc. 1st Int. Conf. Fract, Vol. 3 (1966), p.1739.

[6] A. Hadrboletz and B. Weiss: Int. Mater. Rev. 42 (1997), p.1.

[7] A.L. Gurson, Continuum theory of ductile rupture by void nucleation and growth. Part I. Yield criteria and flow rules for porous ductile media, J Engng Mater Technol Trans ASME, Vol. 99 (1977), pp.2-15.


[8] V. Tvegaard: Influence of void on shear band instabilities under plane strain conditions, Int J Fract, Vol. 17 (1981), pp.389-407.


[9] Oh. Hung-Kuk: Determination of Fracture Toughness by Uni-axial Tensile Test, Engineering Fracture Mechanics, Vol. 55 (1996), pp.865-868.