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Effect ofαphase morphology on fatigue crack growth behavior of Ti−5Al−5Mo−5V−1Cr−1Fe alloy 被引量:10
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作者 Kui-wai CHEN Su-ping PAN +1 位作者 Hui-qun LIU Yong JIANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第9期2459-2471,共13页
Taking a Ti−5Al−5Mo−5V−1Cr−1Fe alloy as exemplary case,the fatigue crack growth sensitivity and fracture features with various tailoredαphase morphologies were thoroughly investigated using fatigue crack growth rate(... Taking a Ti−5Al−5Mo−5V−1Cr−1Fe alloy as exemplary case,the fatigue crack growth sensitivity and fracture features with various tailoredαphase morphologies were thoroughly investigated using fatigue crack growth rate(FCGR)test,optical microscopy(OM)and scanning electron microscopy(SEM).The tailored microstructures by heat treatments include the fine and coarse secondaryαphase,as well as the widmanstatten and basket weave features.The sample with coarse secondaryαphase exhibits better comprehensive properties of good crack propagation resistance(with long Paris regime ranging from 15 to 60 MPa·m1/2),high yield strength(1113 MPa)and ultimate strength(1150 MPa),and good elongation(11.6%).The good crack propagation resistance can be attributed to crack deflection,long secondary crack,and tortuous crack path induced by coarse secondaryαphase. 展开更多
关键词 Ti−5Al−5Mo−5V−1cr−1fe alloy αphase fatigue crack growth fracture feature
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Tribological properties of Fe(Cr)-B alloys at high temperature 被引量:2
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作者 CUI Gong-jun YANG Zhen-wei +1 位作者 WANG Wen-jie GAO Gui-jun 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第10期2643-2650,共8页
This work is aimed to study the effect of boron on wear resistance of Fe-Cr-B alloys containing different boron contents(0 wt%,5 wt%,7 wt%and 9 wt%)from room temperature(RT)to 800°C in order to explore their appl... This work is aimed to study the effect of boron on wear resistance of Fe-Cr-B alloys containing different boron contents(0 wt%,5 wt%,7 wt%and 9 wt%)from room temperature(RT)to 800°C in order to explore their applications as high-temperature wear resistant mechanical parts.Additionally,the wear mechanism of alloys is evaluated.The tribological properties of alloys are systematically studied by using a ball-on-disc tribometer at 10 N and 0.20 m/s from RT to 800°C sliding against Si3N4 ceramic ball.The boron element greatly improves the wear resistance of specimens as compared with that of unreinforced specimen.The friction coefficients of specimens decrease with increasing of testing temperature.The wear rates of Fe-Cr-B alloys decrease firstly and then raise with the increase of boron content.The specific wear rates of specimens with boron are 1/10 of the unreinforced specimen.Fe-21wt%Cr-7wt%B keeps the best tribological properties at high temperature. 展开更多
关键词 fe(cr)-B alloy composite high-temperature tribological property FRICTION wear resistance
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Electroplating process of amorphous Fe-Ni-Cr alloy 被引量:1
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作者 何湘柱 夏畅斌 +2 位作者 王红军 龚竹清 蒋汉瀛 《中国有色金属学会会刊:英文版》 CSCD 2001年第6期956-959,共4页
A novel process of electroplating amorphous Fe Cr Ni alloy in chloride aqueous solution with Fe(Ⅱ), Ni(Ⅱ) and Cr(Ⅲ) was reported. Couple plasma atomic emission spectrometry (ICP AES), X ray diffractometry(XRD), sca... A novel process of electroplating amorphous Fe Cr Ni alloy in chloride aqueous solution with Fe(Ⅱ), Ni(Ⅱ) and Cr(Ⅲ) was reported. Couple plasma atomic emission spectrometry (ICP AES), X ray diffractometry(XRD), scanning electronic microscopy(SEM), microhardness test and rapid heating cooling method were adopted to detect the properties of the amorphous Fe Ni Cr deposit, such as composition, crystalline structure, micrograph, hardness, and adherence between deposit and substrate. The effects of the operating parameters on the electrodeposit of the amorphous Fe Ni Cr alloy were discussed in detail. The results show that a 8.7?μm thick mirror like amorphous Fe Ni Cr alloy deposit, with Vicker’s hardness of 530 and composition of 45%~55% Fe, 33%~37% Ni, 9%~23% Cr was obtained by electroplating for 20?min at room temperature(10~30?℃), cathode current 10~16?A/dm 2, pH=1.0~3.0. The XRD patterns show that there only appears a broad hump around 2 θ of 41?°~47?°for the amorphous Fe Ni Cr alloy deposit, while the SEM micrographs show that the deposit contains only a few fine cracks but no pinholes. 展开更多
关键词 amorphism fe Ni cr alloy ELECTROPLATING trivalent chromium CHLORIDE
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Electrochemical Isolation and Determination of GCP Phase in a Fe-Cr-Ni Alloy
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作者 Ma Xiang, Lu CuifenCentral Iron and Steel Research Institute, MMI,Beijing (100081), China 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 1997年第2期52-56,共5页
Geometrical Close Packed (GCP) phase in Fe Cr Ni alloy was quantitatively isolated and precisely determined when electrolyzed in 10 % H 3PO 4 electrolyte at a low current density of 5 mA/cm 2 and 22 ℃±1 ℃... Geometrical Close Packed (GCP) phase in Fe Cr Ni alloy was quantitatively isolated and precisely determined when electrolyzed in 10 % H 3PO 4 electrolyte at a low current density of 5 mA/cm 2 and 22 ℃±1 ℃. The transpassive dissolution potential of the alloy matrix under above conditions is about 1 140 mV (SCE), at which GCP phase is in passive state and can be isolated from the alloy.[WT5”HZ〗 展开更多
关键词 phase analysis electrochemical separation anodic isolation GCP phase fe cr Ni alloy
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Erosion resistance of Fe-C-Cr weld surfacing layers 被引量:1
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作者 任振安 宣兆志 孙大千 《China Welding》 EI CAS 2001年第1期8-13,共6页
Fe C Cr weld surfacing layers with different compositions and microstructures can be obtained by submerged arc welding with welding wire of the low carbon steel and high alloy bonded flux. With the increase of Cr an... Fe C Cr weld surfacing layers with different compositions and microstructures can be obtained by submerged arc welding with welding wire of the low carbon steel and high alloy bonded flux. With the increase of Cr and C in the layers the microstructures are changed from hypoeutectoid steel, hypereutectoid steel to hypoeutectic iron and hypereutectic iron. When the weld surfacing layers belong to the alloyed cast irons the erosion resistance can be raised with the eutectic increase and the austenite decrease. Good erosion resistance can be obtained when the proportion of the primary carbides is within 10 %. The experimental results lay a foundation to make double metal percussive plates by surfacing wear resistant layers on the substrates of the low carbon steels. 展开更多
关键词 fe C cr alloy erosion resistance alloyed cast iron submerged arc weld surfacing
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