ABSTRACT
This chapter shows the general theoretical and experimental correlation of the porosity dependence of hardness, compressive strength, wear, and related properties, but with variations. Hardness, wear, compressive strength and related behavior, which all involve significant compressive stressing and resultant local tensile stresses, are considered together since they are related qualitatively. There are few or no specific models for the porosity dependence of hardness, compressive strength, or wear, erosion resistance, and related properties. The chapter demonstrates that their porosity dependences are consistent overall with MSA models, the primary models available. It also shows that deviations come from differing dependences on grain size and pore changes accompanying porosity reduction and local penetration, crushing, and collapse of pores. Turning to compressive strengths, there are six sets of data reflecting mainly pores close to idealized shapes. The chapter describes the failure from isolated cylindrical pores stressed normal to their axes.
