共搜索到13776条信息,每页显示10条信息,共1378页。用时:0小时0分0秒250毫秒
Influence of rapid heating process on the microstructure and tensile properties of high-strength ferrite–martensite dual-phase steelPei Li1,Jun Li2,Qing-ge Meng2,Wen-bin Hu1,Chun-fu Kuang31. School... heating rates and soaking temperatures. Microstructures prepared at low temperature(1043 K, FH1) with fast-heating(300 K/s) show banded ferrite/martensite structure, whereas those soaked at high......
One-Dimensional(1-D) Nanoscale HeterostructuresYoshio BANDO,Dmitri GOLBERG摘 要:<正>One-dimensional(1-D)nanostructures have been attracted much... of particular interest with respect to potential applications in nanoscale building blocks of future optoelectronic devices and systems.Many kinds of methods have been developed for the synthesis of 1-D......
......
Fine grain tungsten produced with nanoscale powderTao Lin, Fang Zhao, Liying Zhang, Chengyi Wu, and Zhimeng Guo Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China摘 要:<正>Nanoscale tungsten powder was prepared by reducing nanoscale tungsten trioxide in hydrogen to WO2.90 and further to W......
Mn-Si-Cr系中碳钢在过冷奥氏体状态下变形时的显微组织演变张寒1,白秉哲1(1.北京市清华大学材料科学与工程系先进材料教育部重点实验室)摘 要:将Mn-Si-Cr系中碳钢在过冷奥氏体状态下进行低速率变形,变形促进先共析铁素体转变,但未见层状珠光体形成.铁素体在奥氏体晶界和晶内形核,以近似等轴状长大,交联,并分割奥氏体,形成富碳奥氏体区.随着变形量的增大,铁素体可在富碳奥氏体区内部继续形核长大并交联,导致富碳奥氏体区不断被分割且碳浓度升高,当碳浓度足够高时,一次析出球状碳化物可在富碳奥氏体区边界处形成,尺寸为......
Characteristics of two Al based functionally gradient composites reinforced by primary Si particles and Si/in situ Mg2Si particles in centrifugal casting ZHAI Yan-bo(翟彦博), LIU Chang-ming(刘昌明... functionally gradient composite tubes reinforced by primary Si particles alone and primary Si/ in situ Mg2Si particles jointly were successfully prepared by centrifugal casting, and their structural......
induced ferrite transformation of low carbon manganese (niobium) steel containing ZrC particles under unidirectional compression thermal simulating condition were investigated. The results show that nucleation rate at austenite grain boundaries of the tested steel increases when ZrC particles are added, which affects deformation-induced ferrite morphology, distribution and its refinement......
......
. For ultrafine and nanoscale grades abraded by the coarse SiC, ploughing with some indication of microfatigue was examined. After abrasion by fine abrasive particles, worn surface morphology... Abrasion of ultrafine WC-Co by fine abrasive particles P. V. Krakhmalev Department of Mechanical and Materials Engineering, Karlstad University, SE-651 88 Karlstad, Sweden Received 15 July 2007......
......