材料期刊网

INTERPHASE STRESS CORROSION CRACKING OF ALLOY Ti-24Al-11Nb IN METHANOL SOLUTION

ZHANG Yue , CHU Wuyang , XIAO Jimei(Department of Materials Physics , University of Science and Technology Beijing , Beijing 100083 , China) OUYANG Shixi , YUAN Runzhang(State Key Laboratory for Synthesis and Processing of Advanced Materials.Wuhan University of Technology , Wuhan 430070 , China)

金属学报(英文版)

For alloy Ti-24Al-11Nb,stress corrosion cracking(SCC) in methanol solution and hydrogen induced cracking(HIC) during dynamic charging at room temperature have been studied.Experiment has shown that the normalised threshold stress intensities of SCC failure for various microstructures are KISCC/KC =0.53 0.69 and the threshold value for SCC arresting KISCC/ KIC=0.61-0.79.The threshold values of HIC during dynamic charging are close to that of SCC,but da/dt or fracture time of HIC is one to three orders of magnitude smaller or longer than that of SCC,respectively.The.fracture surface for HIC is also different from that for SCC.For the Ti-24Al-Nb alloy-methanol systein,a kind of inierphase SCC has been found For the microstructures resulting from furnace cooling,SCC initiated and propagated preferentially along theα2/βinterphase boundaries,displaying the microstructure on the fracture surface of SCC.However,there is no interphase SCC for the microstructure resulting from air cooling.

关键词: :Ti-24Al-11Nb , null , null , null

Magnetic Properties for the Single-domain CoFe2O4 Nano-particles Synthesized by the Hydrothermal Method

YANG Zhi , ZHANG Yue , SONG Yu , WANG Jiawei , CHEN Yuang , ZHANG Zhe , DUAN Nian , RUAN Xuefeng

武汉理工大学学报-材料科学版(英文版) doi:10.1007/s11595-015-1285-4

关键词:

Catalytic Activity of Iridium Dioxide With Different Morphologies for Oxygen Reduction Reaction

WANG Guangjin , HUANG Fei , XU Tian , YU Yi , CHENG Feng , ZHANG Yue , PAN Mu

武汉理工大学学报-材料科学版(英文版) doi:10.1007/s11595-015-1244-0

关键词:

Structure and Mechanical Properties of NiPNano Al2O3 Composite Coatings Synthesized by Electroless Plating

ZHOU Guanghong , DING Hongyan , ZHOU Fei , ZHANG Yue

钢铁研究学报(英文版)

NiPnano Al2O3 composite coatings were deposited by electroless plating, and their microstructures were observed by SEM (scanning electron microscope). The microhardness and the wear resistance of the NiPnano Al2O3 composite coatings were measured using microhardness tester and blockonring tribometer, respectively, and the comparison with those of NiP coatings or NiPmicro Al2O3 coating was given. The influences of aging temperature on their hardness and wear resistance were analyzed. The results showed that the nano Al2O3 particles were distributed uniformly in the NiPAl2O3 coatings. Among three kinds of NiP based coatings, the hardness and wear resistance of NiPnano Al2O3 coatings were largest, and the maximum values could be obtained at 400 ℃. This indicated that the precipitation of nano Al2O3 particles would improve the hardness and wear resistance of the NiP coatings.

关键词: composite coating;nano Al2O3;aging treatment;mechanical property