work hardening

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work hardening

[′wərk ¦härd·ən·iŋ]
(metallurgy)
Increased hardness accompanying plastic deformation of a metal below the recrystallization temperature range.
References in periodicals archive ?
Here again, the blends show a clear strain-hardening tendency, although in this case the increase in elongation viscosity and the extent of strain-hardening across all samples is slightly less than that for blends prepared at [150 rpm, 30 min] (Fig.
The analyses involve small constant-depth cracks with crack depth-to-thickness ratio a/t ranging 0.1-0.4 and normalized crack length [theta]/[pi] ranging 0.01-0.08 for pipes with different strain-hardening properties.
It also should be noted that material models of UHPFRC (post-failure tensile stress-displacement relation, post-failure tensile stress-fracture energy relation) are limited to describe strain-hardening effect immediately after the crack opening.
There are similar versions of generalized powerlaw stress-strain relations for strain-hardening or strainsofteningmaterialin theliteratureandsimilarwaveequations can be derived (see, e.g., [15-20]).
studied the strain-hardening responses of DP780 and EDDQ steel sheets using a tension-tension test.
The melt is cooled down to optimal temperature to maximize the melt strength and the strain-hardening behavior at the foam expansion stage.
Unlike typical fiber-reinforced cementitious composites, the component characteristics and proportions within the ECC are carefully determined with the use of micromechanical design tools to achieve the desired strain-hardening response [13].
From this equation, the cyclic strength coefficient (H') and cyclic strain-hardening exponent (n') can be defined, allowing the comparison between monotonic and cyclic mechanical behaviors.
His topics include historical aspects of conventional fiber-reinforced concrete systems, fiber pullout and interfacial characterization, a flexual model for strain-softening and strain-hardening composites, fiber-reinforced aerated concrete, and retrofitting reinforced concrete beam-column joints using textile cement composites.
Due to the formation of flat steady-state cracks in ECC, crack widths do not grow and load capacity does not fall (and rises in most cases) as many cracks form, resulting in a strain-hardening behavior shown in Figure 3.
Nylon fibers in cementitious composites will improve strain-hardening property, tension strength, elastic modulus, and fracture parameter of J-integral [4,8,11,12].
PP resins with LCBs are in market mostly for foam applications and compared to L-PP show a significant strain-hardening behaviour and higher melt strength, as indicated by Lagendijk et al.