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, which increases costs to the health care system and further morbidity to the patient. Moreover, the elastic moduli of current metallic biomaterials are not well matched with those of natural bone... with the formation of biological apatites, magnesium has been recently recognized as a promising biomaterial for bone substitution due to its excellent properties, e.g. relatively low elastic modulus......
characteristics, including low mass density, low absorption for X-ray, low Poisson ratio, high elastic modulus and special alloying properties. Indeed, it has played an important role in nuclear power industry.... References [1] ROBERT G, LEGRAND P, BERNARD S. Multiphase equation of state and elastic moduli of solid beryllium from first principles [J]. Physical Rewiew B, 2010, 82: 104118. [2] NADAL M H, BOURGEOIS L......
attention to higher strength, stronger plasticity, better biocompatibility and elastic modulus which corresponded to human’s skeleton. Pure Ti foams with approximately 70% porosity had been successfully fabricated and showed excellent elastic modulus. Nevertheless, they were still too weak compared with cortical bone [9]. Zirconia(ZrO2) ceramics, which were studied as biomaterials in the late 1960s......
enthalpy and elastic mixing enthalpy. The structure mixing enthalpy can be ignored because of its small value [15], and the elastic mixing enthalpy refers to enthalpy changes caused by the difference of atomic radius. In order to solve problems qualitatively, the elastic mixing enthalpy is ignored. Here, the chemical mixing enthalpy ΔHmix is determined as [15,16]  ......
) The transition from coherent to semi-coherent is controlled by the equilibrium between elastic energy and interfacial dislocation energy. With the increase of the precipitate radius, the elastic energy is so... of Al3Yb and Al (0.037) is much larger than that of Al3Sc or Al (0.013), the rc value (rc=12.3 nm for Al3Sc [18]) has a minor difference because both of the elastic energy and interfacial misfit......
dimensions were determined by a 3D super-depth digital microscope (KEYENCE FE500). The elastic modulus and the Poisson ratio of the constantan wire are Ec=160 GPa and νc=0.33, respectively. For the polymer substrate, the elastic modulus Ep and the Poisson ratio νp are 3.08 GPa and 0.31 [17], respectively. 2.2 Experiments In order to investigate the instability modes under the action of a combined......
气砂岩都表现为亮点,而钙屑灰岩在上覆地层厚度较小时振幅特征表现与砂岩气层相差较大,当地层厚度增大时的钙屑灰岩储层在压实趋势的影响下的振幅特征与含气砂岩几乎相同.导致利用亮点技术或AVO属性进行储层预测时,会出现误判. 图2 研究区岩石弹性趋势 Fig. 2 Rock elastic trend in research area 图3 研究区内砂岩储层与生物碎.... Application of pre-stack elastic impedance inversion to reservoir prediction[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2010, 32(5): 476-479. [5] 黄饶, 刘志斌. 叠前同时反演在砂岩油气藏预测中的应用[J......
in rock formation changes. Based on such rules, wave velocity is often used as a parameter to decide the formation strength and stress damage. Generally, according to the elastic modulus method proposed...; (1) where ED and E are the elastic modulus after and before stress damage, separately. We also know that the relation of P-wave velocity......
. Study on the lubricities of glass and graphite in the deformation processing of the alloy TC4 at high temperatures[J]. Rare Metal Materails and Engineering, 2000, 29(4): 239-241. [42] BAKHSHI-JOOYBARI... for interfacial shear stress and elastic recovery[J]. Journal of Materials Research, 2003, 18(9): 2150-2162. [59] WANG L, ZHOU J, DUSZCZYK J, KATGERMAN L. Identification of a friction model for the bearing channel......
in preparing materials with UFG microstructure. Key words: accumulative roll-bonding; ultrafine grains; severe plastic deformation; microstructure; mechanical properties  ...),低温金属成形(Cryogenic metal forming)和剧塑性变形(Severe plastic deformation, SPD)等,其中剧塑性变形被认为最适于工业化生产[8].近20年来,开发了几种SPD技术来制备具有UFG组织的块材和板材[5, 9?13],如等通道挤压(Equal-channel angular extrusion/pressing,ECAE/P),高压扭转......