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aluminum and aluminum alloy, three types of DRX are likely to occur during hot deformation: 1) Discontinuous dynamic recrystallization (DDRX), which is operated by repeating nucleation and limited grain...] SHEN Jian. Hot deformation behaviors of AA7005 aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(4): 593?597. (in Chinese) [7] ......
extensively and deeply based on the present solidification theory and the experiment results. It can be seen that the temperature field[20-22], solute field[23] and even fluid field are the bases... pushing and solidification behaviour in TiB2 reinforced aluminium PMMCs[J]. Composites, 2005, 36A:747-763. [3] MORTENSEN A, GUNGOR M N, CORNIE J A, FLEMINGS M C. Alloy microstructures in cast metal......
and Table 2 shows the type and amount of rare earth oxides addition. Among them Re0 has the same basic alloy system as others with no rare earth oxides addition for the reason of comparison. The core... speed of Cr; rare earth elements aggregate at the boundary of alloy and oxidation film which can release the stress; rare earth elements can form sosoloid in the film and improve its ability of plastic......
; aluminium; SiC; Al/SiC nanocomposite; mechanical alloying; hot pressing 1 Introduction Aluminium based composite has been widely used in many fields owing to its excellent properties. It is generally... aluminium based composite. In the liquid methods, particles are added to liquid aluminium by stirring before casting. However, the difference in thermal expansion coefficients between these two......
. 图8 SiCp/Al-17Si梯度复合材料高速高载荷时的磨损表面形貌 Fig.8 Worn surface morphologies of SiCp/Al-17Si alloy gradient composites at higher speed and load: (a) As-deposited; (b) Hot-pressing 从图8中看出,热压态的磨损表面局... aluminium alloy (Al-Zn-Mg) and hard particle composites[J]. Wear, 2009, 267: 1688-1695. [3] NATARAJAN N, VIJAYARANGAN S, RAJENDRAN. Wear behaviour of A356/25SiCp aluminium matrix composites sliding......
and alloy modi?cation [2-3]. Generally, coarse grain fully lamellar microstructures exhibit relatively poor tensile ductility and strength, but relative grain-refining near-γ or duplex microstructures show... increasing from 0.2% to 6%. Samples with the addition of Sm2O3 have higher densities due to their lower melting points [13], which increases densities of the TiAl-based composites. The second reason must......
the largest C44 among TixV1-xC (0≤x≤1), indicating that Ti0.5V0.5C has higher hardness than pure TiC. However, Ti0.5V0.5C presents brittleness based on the analysis of ductile/brittle behavior. The Ti0.5V0.5C... composites (MMCs) [1-2]. In our previous studies, TiC carbide was in situ synthesized from Fe-Ti30 alloy and graphite to fabricate TiC/Fe composite surface coating [3]. It was found that the wear......
(一个循环周期)剪切面不具重复性[13]. 图1 铸态Al-10.9%Mg2Si合金的XRD谱 Fig.1 XRD pattern of as-cast Al-10%Mg2Si alloy 图2 铸态Al-10.9%Mg2Si合金的SEM像 Fig.2 SEM images of as-cast Al-10.9%Mg2Si alloy...-P master alloy on primary Mg2Si in Al-Mg-Si alloys[J]. J Alloys Compd, 2008, 465(1/2): 145-150. [7] MABUCHI M, KUBOTA K, HIGASHI K. Effect of hot extrusion on mechanical properties of a Mg-Si-Al......
of rare earth elements on Fe-Cr alloy in wet atmosphere have also been clearly proved [5-7]. The reactive elements can be introduced as alloying elements and oxide coatings, or they can be implanted onto the alloy surface. The choice of coatings seems to be the most practical procedure to introduce reactive element without altering the mechanical properties of the metallic substrate......
processes [J]. Journal of Materials Science, 2003, 38(12): 2771-2779. [7] LI Ji-yong, ZHAO Yong, CHEN Hua-bing. Friction stir welding of TiB2 particulate A356 aluminum alloy composite [J]. Journal... reinforced aluminum matrix composites [J]. Light Alloy Fabrication Technology, 2009, 37(1): 11-15. (in Chinese) [12] VINCENT J E, JAMES W K, CHAD M M. Estimation of the thermal conductivity of composites [J......
