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NANOSIZE EFFECT IN GRAIN BOUNDARY MIGRATION OF COPPER D.G.Li1,N.G.Zhou2,X.Q.Wei2,L.Zhou2 (1.Central Iron and Steel Research Institute, Beijing 100083, China;2.School of Materials Science... and leads to annihilation of the grain boundaries. The critical size is found to be 16 atomic radii. A "through intermediate grain mechanism" is identified for the nano-grain boundary motion observed......
evolutions of texture and grain boundary plane distributions in a ferritic stainless steelFANG Xiao-ying(方晓英)1, WANG Wei-guo(王卫国)1, GUO Hong(郭红)1, QIN Cong-xiang(秦聪祥)1, ZHOU Bang-xin(周邦新)2(1... energy reduction of the system is mainly caused by the grain boundary plane re-orientation in addition to minor grain growth because the distributions of grain boundary planes are moderately preferred......
precipitation, a Cu and Li-depleted precipitate-free zone(PFZ) is formed along grain boundary and subgrain boundary[8,9]. To clarify the functions of the aging precipitate of T1 in Al-Li alloys, its..., KUMAI et al[7] suggested that the preferential dissolution of precipitate- free zone(PFZ) along grain boundaries caused its intergranular corrosion in NaCl solution. T1 is the main strengthening......
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Trans. Nonferrous Met. Soc. China 24(2014) 2122-2129 Non-isothermal retrogression kinetics for grain boundary precipitate of 7A55 aluminum alloy Di FENG1,2, Xin-ming ZHANG1,2, Sheng-dan LIU1,2, Ze... of Ministry of Education, Central South University, Changsha 410083, China Received 17 October 2013; accepted 16 April 2014 Abstract: The retrogression kinetics for grain boundary precipitate (GBP) of 7A55......
NON-EQUILIBRIUM SOLUTE SEGREGATION TO AUSTENITIC GRAIN BOUNDARY IN FERRUM-NICKLE ALLOY D.Y.Yu1,P.Wu1,X.L.He1 (1.Department of Material Physics, University of Science & Technology Beijing, Beijing... measured by a special image analysis system. The experimental resultsof PTA show that the grain boundary segregation of boron during cooling process is adynamic process and the development of the non......
, prolonging transfer time can increase the percentage of intergranular fracture, which is mainly caused by wide grain boundary precipitate free zone. The failure mode of the Zr-containing alloy... grain boundary precipitate free zone and coarse equilibrium η phases in the matrix. Key words: 7055 aluminum alloy; transfer time; mechanical properties; grain boundary precipitate free zone......
Cavitation and grain boundary sliding during creep of Mg-Y-Nd-Zn-Mn alloy V. JAN?K1, F. HNILICA1, P. ZUNA1, V. O?EN??EK2, I. STUL?KOV?3 1. Department of Materials Engineering, Faculty... set of creep tests was interrupted after the onset of ternary creep. Fraction of cavitated dendritic boundaries was evaluated using optical microscopy. Measurement of grain boundary sliding......
, whereas an intermetallic κ-Co3(W) phase precipitates at grain boundaries. Y is found to fully segregate at grain boundaries and changes grain boundary precipitate morphologies. For 0.01 Y alloy, bright... on tensile behavior of Co-AlW-Ta-B alloy was discussed from the viewpoints of grain boundary precipitate morphologies, grain boundary character distribution(GBCD), and impurity segregation.关键词:......
PHOSPHORUS GRAIN BOUNDARY SEGREGATION IN A P-DOPED 2.25Cr1Mo STEEL S.H.Song1,D.D.Shen1,J.LIU1,L.Q.Wen2,Z.X.Yuan1 (1.The Hubei Province Key Laboratory of Ceramics and Refractories, Wuhan University of Science and Technology, Wuhan 430081, China;2.School of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China) Abstract:Grain boundary......