Influence of Different Types of Deformation on the Physical and Mechanical Properties of H.C.P. and F.C.C. Metals and Alloys

Abstract

We present an overview of the influence of different types of deformation with different stress distributions (rolling, drawing, deformation by hydrostatic compression method of quasi-hydroextrusion (QHE) and sequential combination of drawing and QHE at 77 K and 300 K on different physical and mechanical properties of metals and alloys: h.c.p. (Hf, Zr, Ti) and f.c.c. (Al–Mg–Li, 06Х16Н15М3B austenitic steel). The differences in the level of strength, the rate of accumulation of deformation defects, and the anisotropy of their distribution within the bulk of deformed material after drawing, rolling, and QHE are revealed. For the 06Kh16N15M3B steel as an example, we established the reasonability to use a sequence of a combined deformation by drawing with quasi-hydroextrusion for a significant increase in the strength of steel, than that after each individual type of deformation. We revealed the 25%-lowering of the stacking fault energy of titanium, i.e. splitting of dislocations due to the deformation under the uniform compression at 77 K and 300 K. The abnormal increase in shear modulus after the deformation of titanium by hydrostatic compression is revealed. Finally, we discuss the mechanisms of the influences of different types of deformation on mechanical properties of metals and alloys.

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