Theorem (Consistency of EDP and ECAP) Let the regularity assumptions hold. Let D = {x1, . . . , xn} ⊆ X be an i.i.d. sample from f and G be the directed, unweighted kNN-graph on D. Given G as input and a vertex i ∈ {1, . . . , n} chosen uniformly at random, both EDP({i}) and ECAP({i}) converge to the true dimension d in probability as n→∞ if k = k(n) satisfies k ∈ o(n), logn ∈ o(k), and there e...

New Mg-3Zn-2Ca magnesium alloy was prepared using different processing techniques: gravity casting as well as squeeze casting in liquid and semisolid states. Materials were further thermally treated; thermal treatment of the gravity cast alloy was additionally combined with the equal channel angular pressing (ECAP). Alloy processed by the squeeze casting in liquid as well as in semisolid state ...

Improving the strength values of low–medium-strength shipbuilding steels without changing chemical properties will be very useful to meet high-strength requirement in ships. Heat treatments and severe plastic deformation methods are main used increase steel structure. Considering high improvement effect values, quenching process equal channel angular pressing (ECAP) method stand out among heat ...

V.A. Andreyachshenko, Faculty of Nanotechnology and Metallurgy, Karaganda state technical University, Karaganda, Kazakhstan A.B. Naizabekov, Mining and Metallurgy Faculty, Rudny Industrial Institute, Rudny, Kazakhstan In the present research, equal channel angular pressing (ECAP) was conducted. The defectness degree of the alloy for one pass and maximum strain was determined. Ultra fine grained...

Among different SPD techniques, Equal channel Angular Pressing has attracted the most attentions, because of applying large strain to solid bulk materials. In this research, ECAP process up to 6 passes was carried out on a pure copper and a 6012 Al-Mg-Si alloy with BC route in ECAP dies with Φ=120 and Ψ=20 and diameter of 20and 10 millimeter respectively. Moreover, X-ray diffraction (XRD) syste...

Static recrystallization and grain growth behaviors were investigated in Mg-0.3Ce (wt%) alloy processed by equal-channel angular pressing (ECAP) for N = 1 (?eq 0.9), 2 1.9), 4 3.9) passes at 300 °C using route Bc annealed 450 5, 30, 60, 180 min. The results demonstrated that the microstructure texture are strongly related to strain level, second particles distribution, fraction of dynamic (DRX)...

Among different SPD techniques, Equal channel Angular Pressing has attracted the most attentions, because of applying large strain to solid bulk materials. In this research, ECAP process up to 6 passes was carried out on a pure copper and a 6012 Al-Mg-Si alloy with BC route in ECAP dies with Φ=120 and Ψ=20 and diameter of 20and 10 millimeter respectively. Moreover, X-ray diffraction (XRD) syste...

Ultrafine-grained Al matrix nanocomposites, reinforced with Al2O3 nanoparticles, were produced from milled powders, either by equal channel angular pressing (ECAP), at room or high temperature, without back pressure, spark plasma sintering (SPS). Their microstructures, mechanical properties (compression, hardness, and sliding wear), thermal stabilities (thermally induced softening cracking) com...

In recent years, research on ultra-fine grain materials has gained attention. While attempts have been made to improve the properties of material, it also become increasingly important decrease costs. Studies improving material revealed new production methods or required revision existing methods. this direction, severe plastic deformation come fore as a good alternative, and by with variations...