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containing many CuZr martensite plates is crystallized seriously. Mechanical properties of bulk Zr49Cu46Al5 nanocrystalline composite and Zr48.5Cu46.5Al5 alloy measured by compression tests at room temperature show that the work hardening ability of Zr48.5Cu46.5Al5 alloy is larger than that of Zr49Cu46Al5 alloy. Key words: bulk metallic glass; mechanical properties; nanocrystalline composite ......
by experimental data of bulk nanocrystalline Ni prepared by hydrogen direct current arc plasma evaporation method and hot compression. The effect of the evolution of porosity on stress-strain relations...]. International Journal of Plasticity, 2004, 20(11): 2007-2026. [14] LI J, WENG G J. A secant-viscosity composite model for the strain-rate sensitivity of nanocrystalline materials [J]. International Journal......
, nanocrystalline structure. The difference in the densities between the as-cast bulk metallic glass and the fully crystallized state is in the range of 0.30%-0.54%, which is smaller than the previously reported... glasses composite [J]. Acta Mater, 2001, 49(9): 1507-1513. [21] ECKERT J, KUHN U, MATTERN N, HE G, GEBERT A. Structural bulk metallic glasses with different length-scale of constituent phases [J......
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a yield strength as high as 610 MPa[10-11]. Powder metallurgy (P/M) is a quite potential way to prepare nanocrystalline or ultrafine grained bulk alloys. For most Mg alloys, however, it is difficult... Nanocrystalline Mg and Mg alloy powders by hydriding-dehydriding processing WANG Xin(王 辛), WANG Heng(王 珩), HU Lian-xi(胡连喜), WANG Er-de(王尔德) School of Materials Science and Engineering, Harbin......
J. Cent. South Univ. Technol. (2008) 15(s1): 447-452 DOI: 10.1007/s11771-008-397-9 Mechanical model for yield strength of nanocrystalline materials under high strain rate loading ZHU Rong-tao(朱... yield strength of nanocrystalline materials, a new mechanical model based on the deformation mechanism of nanocrystalline materials under high strain rate loading was developed. As a first step......
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products, changes in the lattice parameter as well as the grain size. Key words: FeAl; composite; mechanical alloying; structural evolution; nanocrystalline... Synthesis and grain growth kinetics of in-situ FeAl matrix nanocomposites(Ⅰ): Mechanical alloying of Fe-Al-Ti-B composite powder REN Rong(任 榕), WU Yu-cheng(吴玉程), TANG Wen-ming(汤文明), WANG Feng......
: The preparation of bulk nanocrystalline Al-10Zn-3Mg-1.8Cu (mass fraction, %) alloy by mechanically milling at cryogenic temperature (cryomilling) and hot pressing in vacuum was studied. By X-ray diffraction (XRD... pressing in vacuum. After hot extrusion and heat treatment, the grains grow to about 300nm. The results obtained herein suggest that the significant thermal stability of the bulk nanocrystalline Al-Zn-Mg-Cu......
of coating[1-2]. In recent years, jet electrodeposition technique, used for nanocrystalline coatings or bulk metals, has gained a wide range of applications with great prospects in the coming... nanocrystalline pure metal, alloy, as well as composite coatings. Another assisting measure for electrochemical process is pulse plating. Compared with direct current deposition, pulse plating takes some......
