Abstract
The strengthening mechanisms of alloys composed of more than one phase are discussed in a systematic manner. A definition is proposed for certain types of microstructures. Plastic strain of fine dispersion structures (precipitation-hardened alloys) can vary between homogeneous and extremely localized in a few slip bands. There are consequences of localization on yield and fracture stress, static and cyclic work-hardening ability, fatigue crack initiation, and propagation.
A distinction is required between fine and coarse two-phase structures. While the strength of the former can be adequately treated with dislocation theory, the latter require a micromechanical approach similar to that of composite materials. As examples will serve some aspects of strength of alloys with dual phase and duplex structures. Finally, it is shown that the microstructure leading to maximum yield stress need not be identical with that of optimum wear resistance.
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Hornbogen, E. Strength of alloys with heterogeneous microstructures. Czech J Phys 35, 193–205 (1985). https://doi.org/10.1007/BF01605082
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DOI: https://doi.org/10.1007/BF01605082