Effect of microstructure and strength on the fracture behavior of AA2219 alloy

Effects of ARB and ageing processes on mechanical properties and microstructure of 6061 aluminum alloy

“…It can be seen that these particles provide the sites for the heterogenic nucleation of dimples. Sharma et al (2009) have stated that, the fracture of tensile specimens was predominantly caused by microvoid coalescence at coarse constituent particles.…”

Effect of Precipitate Embryo Induced by Strain on Natural Aging and Corrosion Behavior of 2024 Al Alloy

“…The final precipitation phase of these samples thus consists of two parts: Undissolved pre-precipitated phase (larger size) and NA precipitates (smaller size) from precipitate embryos. The formation of GPB zone or S phase in NA can be understood from several aspects [11]: (i) In Al alloy, GP (GPB) zone is preferentially formed in NA process [36] due to a very low interfacial energy [37]; (ii) under NA conditions, the diffusivity of Cu is not high enough, which is beneficial to the formation of stable Cu-Mg clusters (or GPB zones), and conversely, the formation of S precipitates (Al2CuMg); (iii) the dislocation density of the rolling sample is very high as shown in all the STEM pictures, and it is difficult to recover during the NA process. Therefore, the nucleation sites (dislocations/embryo) may be highly dense.…”

Application of powder metallurgy and hot rolling processes for manufacturing aluminum/alumina composite strips

“…The shape of the dimples can determine the type of loading the component experienced during fracture, and the orientation of the dimples reveals the direction of crack extension [52,53]. Sharma et al [54] have found that the fracture of tensile specimens was predominantly caused by microvoid coalescence at coarse constituent particles. It is well known [55] that, the tensile elongation is decreased with the addition of reinforcing particles.…”