The effect of the grain size on the mechanical properties of metallic materials has been a topic of significant interest for researchers and industry. For many decades, a relationship defining the mechanical strength proportional to the inverse of the square root of the grain size has been widely...
The grain size has, however, a different effect on the yield stress. So, both before and after the ion implantation, the increase of the grain size leads to the decrease of the alloy hardening. Thus, hardening in ultra-fine and fine grain alloys increased by four times, while in ...
Three-point bending and fracture toughness tests of alumina specimens with various grain sizes were carried out to investigate the effects of grain size on bending strength and fracture toughness. The bending strength increased with decreasing grain size. The intrinsic fracture toughness, which can be...
Effect of Defects and Grain Size on Strength of Mullite CeramicsMany studies have been conducted on the strength and fracture toughness K IC of ceramics. However, more extensive studies are still necessary to explain the relationship between defects and grain size 1 , and its effects on the ...
The effect of grain boundaries on the yield strength σ y of polycrystals of the nickel-base superalloy NIMONIC PE16 has been investigated. NIMONIC PE16 is strengthened by precipitates of the ordered γphase. The average radius of the γ′-particles was between 6 and 59 nm. The average grai...
When D was held constant, the strength decreased as the ratio increased. The Hall–Petch relationship between the compression yield strength and the grain size was found to depend on the specimen diameter. The effect of feature size was greater than that of grain size. A new model of the ...
In each microstructure the threshold value was reduced by increasing the load ratio, the load ratio sensitivity being greatest for low yield strengths. The results are consistent with a model, proposed by Ritchie, based on environmental interactions at the crack tip. The grain size effect on the...
Effect of Cu Ion Concentration on Microstructures and Mechanical Properties of Nanotwinned Cu Foils Fabricated by Rotary Electroplating Rotary electroplating was employed to fabricate high-strength nanotwinned copper (nt-Cu) foils serving as a current collector for high energy-density lithi... C Chen ...
Experimental/ copper alloys crystal microstructure dislocations gold alloys grain size plastic deformation tensile strength work hardening yield point/ grain size yield stress work hardening Cu 3Au dislocation microstructure tensile deformation ordered Cu 3Au disordered Cu 3Au glide cell structure stress stra...
Furthermore, the effect of localized grain-size-dependent weakening on the long-term strength and elastic thickness of continental lithosphere is investigated and compared with pure dislocation-creep experiments. Modelling grain-size evolution in the upper mantle...