Through high-resolution electron microscopy, stacking faults (SFs) due to Frank partial dislocations were found in an aluminum alloy following deformation with low strain and strain rate, while also remaining stable during artificial aging. Extrinsic stacking faults were found surrounded by dislocation areas and precipitates. An intrinsic stacking fault was found between two Guinier-Preston II ...

luminium based composite are getting a vast scope nowadays because of its properties and availability. In the present work, fly ash and AL2O3 reinforced composite are prepared using stir casting technique for varying wt.% (fly ash 3% and AL2O3 3%, 6% & 9%). Hardness and tensile properties were determined, with the addition of reinforcement the properties are improved compared to the parent meta...

Most aluminum alloys, especially the 7xxx series, are incompatible with laser additive manufacturing due to many factors. In-situ process monitoring technology offers an excellent opportunity for understanding and control, which improves component quality repeatability of AM. In this study, emission spectroscopy plume imaging were utilized monitor understand laser-directed energy deposition Al7...

Abstract The characteristics and structural performance of a composite material’s properties are better than those its component parts because It comprised pair or more insoluble, chemically separate stages. functioning alone. ‘Metal-Matrix’ composites materials that have been produced from metals ceramics had fibers particles incorporated into them to enhance their physical characteristics. fa...

In the current research Al7075 (Al-5.4Zn-2.6Mg) alloy and composite prepared by dispersing 2 wt.% granite powder 3 Si3N4 in are subjected to peak aging treatment at 100, 120 1500C obtain maximum induced hardness solid solution strengthening. succession, results of pre aged heat treated three step conditions. The indicated that has resulted enhanced 185.6 VHN as compared 142.9 1000C resulting 29...

Failure analysis and fatigue life prediction are necessary and critical for engineering structural materials. In this paper, a general methodology is proposed to predict fatigue life of smooth and circular-hole specimens, in which the crack closure model and equivalent initial flaw size (EIFS) concept are employed. Different effects of crack closure on small crack growth region and long crack g...

The critical energy release rate defined as Gc = 2γ + γp (where, γ is the cohesive energy and γp is the plastic work) is widely used as a macroscopic fracture criterion. During embrittlement of Aluminum by Gallium, impurity segregation is localized to a small region along the grain boundary and the bulk plastic properties is unaffected. Yet, the critical energy release rate (which is predominan...

Cavitation erosion prediction and characterization of cavitation field strength are of interest to industries suffering from cavitation erosion detrimental effects. One means to evaluate cavitation fields and materials is to examine pitting rates during the incubation period, where the test sample undergoes localized permanent deformations shaped as individual pits. In this study, samples from ...