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PHOSPHORUS SEGREGATION AND ANNEALING EMBRITTLEMENT OF Ni-P AMORPHOUS
Qu Zhe XIE Tiansheng Institute of Metal Research,Academia Sinica,Shenyang,China,
Qu Zhe XIE Tiansheng Institute of Metal Research
,Academia Sinica,Shenyang,China

金属学报(英文版) , 1991,
Abstract: Phosphorus segregation and embrittlement of Ni-P amorphous annealed at the temperatures below crystallization have been investigated.The phosphorus enrichs on free surface and its level increases with annealing temperature.This is fairly coincident with the measured toughness which decreases with annealing temperature.AES ion-sputtering revealed that a phosphorus depletion zone in the subsurface layers forms due to element redistribution during annealing.The thickness and amplitude of the phosphorus depletion zone depend on the an- nealing temperature. The formation of depletion zone and the mechanism of embrittlement of Ni-P amorphous during annealing have been discussed based on the theory of the activation energy of atomic diffusion in the amorphous being variable.
Effect of Strain Rate on Hydrogen Embrittlement Behaviour of Amorphous NiCrFeSiB Alloy
Yu,ZUO,

材料科学技术学报 , 1996,
Abstract: The effect of strain rate on hydrogen embrittlement behaviour of amorphous Ni-6.6Cr-2.6Fe-7.8Si-14.5B (at pct) alloy in 0.1 mol/L H2SO4 solution was studied by the methods of slow Strain rate testond electrochemical charging. The results show that fracture Stress of the alloy decreases with the decrease of Strain rate within a certain range. As a tentative explanation, the effect of strain rate on hydrogen embrittlement fracture stress was attributed to the interaction between hydrogen and the excess volume in amorphous alloys
EFFECTS OF Ce ON EMBRITTLEMENT AND CRYSTALLIZATION OF AMORPHOUS Fe_(76)B_(15)Si_9 ALLOY
Ce对非晶态Fe76B15Si9合金脆化及晶化的影响

CHE Xiaozhou,
车晓舟

材料研究学报 , 1995,
Abstract: Effects of micro-addition of Ce on annealing embrittlement and crystallization of Fe76B15Si9 metallic glasss have been studied. Micro-addtions of Ce obviously affect the susceptibility to embrittlement of Fe76B15Si9 metallic glass and form stable particles in strips by reacting with impurities; these particles act as nucleating center and accelerate the inhomogeneous nucleation, and as a result, lower the crystallization onset temperature for amorphous Fe76B15Si9 alloy; but do not affect the sequence and resultants of crystallization.
Annealing crystallization and catalytic activity of ultrafine NiB amorphous alloy
Shiqiang Wei,Zhongrui Li,Xinyi Zhang,Changrong Chen,Wenhan Liu,Xiaoguang Wang,Tiandou Hu,Yaning Xie,Tao Liu
Chinese Science Bulletin , 2001, DOI: 10.1007/BF03187258
Abstract: Annealing crystallization of ultrafine NiB amorphous alloy prepared by the chemical reduction method was studied by DTA, XRD and XAFS techniques. The XRD and XAFS results have revealed that the crystallization process of ultrafine NiB amorphous alloy proceeds in two steps. First, ultrafine NiB amorphous alloy is crystallized to form metastable nanocrystalline Ni3B at an annealing temperature of 325°C. Second, the nanocrystalline Ni3B is further decomposed into crystalline Ni at 380°C or higher temperature, the local structure around Ni atoms in resultant product is similar to that in Ni foil. It was found that the catalytic activity of nanocrystalline Ni3B for benzene hydrogenation is much higher than that of ultrafine NiB amorphous alloy or crystalline Ni. The result indicates that the active sites of nanocrystalline Ni3B for benzene hydrogenation are composed of both Ni and B with proper geometry configuration.
Annealing crystallization and catalytic activity of ultrafine NiB amorphous alloy

WEI Shiqiang,LI Zhongrui,ZHANG Xinyi,CHEN Changrong,LIU Wenhan,WANG Xiaoguang,HU Tiandou,XIE Yaning,LIU Tao,

科学通报(英文版) , 2001,
Abstract: Annealing crystallization of ultrafine NiB amorphous alloy prepared by the chemical reduction method was studied by DTA, XRD and XAFS techniques. The XRD and XAFS results have revealed that the crystallization process of ultrafine NiB amorphous alloy proceeds in two steps. First, ultrafine NiB amorphous alloy is crystallized to form metastable nanocrystalline Ni3B at an annealing temperature of 325°C. Second, the nanocrystalline Ni3B is further decomposed into crystalline Ni at 380°C or higher temperature, the local structure around Ni atoms in resultant product is similar to that in Ni foil. It was found that the catalytic activity of nanocrystalline Ni3B for benzene hydrogenation is much higher than that of ultrafine NiB amorphous alloy or crystalline Ni. The result indicates that the active sites of nanocrystalline Ni3B for benzene hydrogenation are composed of both Ni and B with proper geometry configuration.
ATOMIC SCALE MECHANISM OF RESTRAINED EMBRITTLEMENT IN AMORPHOUS Fe_(78)B_(13)Si_9 ALLOY BY ELECTRIC PULSE RAPID ANNEALING
JL Huang,XG Cao,E Sukedai,S Yamasaki,and HCGu,
J.L. Huang
,X.G. Cao,E. Sukedai,S. Yamasaki,and H.C.Gu

金属学报(英文版) , 1998,
Abstract: 1.IntroductionTheiron-basedamorphousalloysproducedviarapidquenchingtechniquepossessgoodmechanicalproperties.However,toacquiredesirablesoftmagneticproperties,alongperiodofconventionalfurnaceannealing(CFA)(1-2h)isrequired.Unfortunately,theannealingembrittlementoccursinevitablytocreatemanydifficultiesinpractice.Flashannealingorelectricpulserapidannealing(EPRA)isbasedonthejouleheatingeffectsofatransientcurrentpulseflowinginanamorphousribbon.RecentlyithasbeenprovedthatEPRAisasuitablemethodfori…
STUDY OF Fe-Mo AMORPHOUS ALLOY ELECTRODEPOSITION
非晶态Fe-Mo合金电沉积研究

ZHU Liqun,
朱立群

材料研究学报 , 1991,
Abstract: The amorphous or crystal structure of Fe-Mo alloy deposit has been ob-tained in a strong alkaline solution of different Mo content and in differentelectrodeposition conditions.The bath is stable and the process is simple.The amorphousstate coating can be
EFFECTS OF MINOR-CARBON CONTENT ON SURFACE STRUCTURES AND EMBRITTLEMENT OF AS-CAST Fe-Si-B AMORPHOUS ALLOY WIRE
微量碳对淬态Fe—Si—B非晶丝表面层结构及脆性的影响

LIANG Nairu,LI Dianchen,HE Kaiyuan,LAI Zuhan,
梁乃茹
,李殿臣,何开元,赖祖涵

金属学报 , 1996,
Abstract: Fe-Si-B amorphous alloy wires were prepared by the melt spinning in rotating water and the tensile and bending properties of as-cast wires were maesured. Minor carbon, makes the wires embrittle. The enrichment of carbon and the precipatation Fe_(23) (C,B),_6 phases in the surface layer of wires were observed by SEM, TEM and SAM.It seems that Fe_(23) (C, B)_6 induced the embrittlement of as-cast amorphous wires.
EFFECT OF ROTATIONAL FIELD ANNEALING ON MAGNETIC ANISOTROPY OF Fe_5Co_(73)Si_(10)B_(12) AMORPHOUS ALLOY

GUAN Kehong,SUN Tinglie,LI Donghui,

金属学报 , 1983,
Abstract: Ribbon specimens were prepared from Fe_5Co_(73)Si_(10)B_(12) amorphous alloy and quenched, annealed or rotational field annealed separately. According to the variation on the magnetization and the magnetostriction figures with different annealed states of them, the magnetic anisotropy induced by the spontaneous magnetization field may be released by the rotational field annealing for such ahoy of which the Curie point is lower than the crystallizing temperature. Th ereason why the amorphous ahoy as-quenched is magnetic anisotropy has been analyzed and discussed.
Embrittlement of a Cr-Mo Low-Alloy Steel due to Low-Temperature Neutron Irradiation
EMBRITTLEMENT OF A Cr-Mo LOW-ALLOY STEEL DUE TO LOW-TEMPERATURE NEUTRON IRRADIATION

SH Song,LQ Weng,
S.H.
,Song,and,L.Q.,Weng

金属学报(英文版) , 2006,
Abstract: Embrittlement of a 2.25Cr1Mo steel stemming from neutron irradiation at 270oC is studied by virtue of small punch testing in conjunction with scanning electron microscopy. The ductile-brittle transition temperature determined by the small punch test is much lower than that determined by the standard Charpy test. There is some irradiation-induced embrittlement effect after the steel is irradiated for 46 days with a neutron dose rate of 1.05?0-8 dpa/s.
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