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Search Results: 1 - 10 of 16813 matches for " by ZHONG Zengyong "
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Rigorous Proof of Goldbach’s Conjecture  [PDF]
Zengyong Liang
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.69153
Abstract:
In this article, we use set, function, sieve and number theory to study the prime and composite numbers, prove that the lower limit formula of the number of prime numbers derived from the Euler’s function, and find d(n) to count the lower limit formula of the number of prime integer-pairs. We proved that Goldbach’s conjecture is correct by mathematical induction. Finally, we proved proof reliance by mathematical analysis and computer data.
INTERMETALLIC COMPOUNDS FOR HIGH TEMPERATURE STRUCTURAL MATERIALS
金属间化合物高温结构材料

ZHONG Zengyong,
仲增墉

材料研究学报 , 1990,
Abstract: In this paper the progress in research and development of in ter metalliccompounds In briefly described.The characteristics of ordered alloys,especially thebrittleness problem and the way to overcome it,and the furture development trend are dis-cussed.
EFFECT OF Mg CONTENT ON CREEP BEHAVIOUR OF Ni-BASE WROUGHT SUPERALLOY

KE Da'nian,ZHONG Zengyong,

金属学报 , 1983,
Abstract: The effect of addition of Mg on the creep behaviour of Ni-base wrought superalloy has been investigated. It was found that the trace Mg added may cause the alteration of continueous lath carbide into discontinueous massive one at the grain boundaries. It may also promote the spheroidization of the grain boundary carbide, decrease the diffusion coefficient of grain boundary and increase the activation energy for creep. The grain boundary energy and the boundary energy between grain boundary carbide and matrix are decreased and bonding strength of interface increased. Thus, the creep property and the creep-rupture life as well as the stress exponent of creep of the superalloy may be significantly improved by the impediment of the boundary sliding and the prevention of the nucleation and propagation of cracks.
A STUDY OF ZIGZAG GRAIN BOUNDARY IN HIGH ALLOYED WROUGHT NICKEL-BASE SUPERALLOY

by ZHONG Zengyong,MA Peili,CHEN Gansheng,

金属学报 , 1983,
Abstract:
Proof of Beal Conjecture  [PDF]
Zengyong Liang
Advances in Pure Mathematics (APM) , 2019, DOI: 10.4236/apm.2019.95021
Abstract: Beal conjecture is a famous world mathematical problem and was proposed by American banker Beal, so to solve it is more difficult than Fermat’s last theorem. This paper uses relationship between the mathematical formula and corresponding graph, and by characteristics of graph, combined with the algebraic transformation and congruence theory of number theory; it is proved that the equation can only be formed under having a common factor and Beal conjecture is correct.
Microstructure and Mechanical Properties of TiAl-based Alloy
Zhongjie PU Jiandong SHI Dunxu ZOU Zengyong ZHONG Central Iron,Steel Research Institute,Beijing,China,

材料科学技术学报 , 1993,
Abstract: Two phases gamma titanium aluminide alloy,Ti-46.5Al-2.5V-1Cr.was investigated to characterizemicrostructures and to define the microstructure/mechanical property relationship.Many kinds ofmicrostructure of gamma and α_2 phases were obtained by heat treatments in the α+γ,α_2+γ and αfields.The effects of microstructure on tensile properties,fracture toughness and J-R resistancecurve at room temperature,were systematically studied.The experimental results showed that themicrostructure had a strong effect on mechanical properties,The duplex microstructure produced byheat treatment at 1250℃×4 h with controlled cooling resulted in the highest ductility of 4.8% tensileelongation,low fracture toughness and crack growth resistance.The fully lamellar microstructureproduced by heat treatment in the α field having large grain sizes resulted in the highest fracturetoughness but the lowest ductility.
FRACTURE MECHANISMS OF FFL MICROSTRUCTURE IN TiAl ALLOY
TiAl合金细小全层片组织断裂机理

ZHANG Ji,ZHANG Zhihong,ZOU Dunxu,ZHONG Zengyong,
张继
,张志宏,邹敦叙,仲增墉

金属学报 , 1996,
Abstract: The observations of the crack morpholgies on the side faces and fracture surfaces of the fracture toughness specimens and the TEM analyses of deformed structure around crack were conducted for the FFL microstructure which was obtained from the cast Ti-46.5 Al-2.5V-1.0Cr-0.2Ni(atomic fraction,%) alloy by a designed multiple heat treatment.The fracture characterizations of the FFL microstructure are similar to that of the FL microstructures.The functions of each shear ligment and total deformed volume accompanying the crack in the FFL microstructure were much smaller due to the significant decrease of the lamellar colony size.This led to a descent of fracture toughness of the FFL microstructure compared to the general FL microstructure.
How Do the Nucleons Pack in an Atomic Nucleus?  [PDF]
Xiaodong Li, Qijun Liu, Gongyi Li, Yihe Li, Zengyong Chu
World Journal of Nuclear Science and Technology (WJNST) , 2014, DOI: 10.4236/wjnst.2014.44030
Abstract: A nuclear structure model of “ring plus extra nucleon” is proposed. For nuclei larger than 4He, protons (P) and neutrons (N) are basically bound alternatively to form a ZP + ZN ring. The ring folds with a “bond angle” of 90° for every 3 continuous nucleons to make the nucleons packed densely. Extra N(‘s) can bind to ring-P with the same “bond angle” and “bond distance”. When 2 or more P’s are geometrically available, the extra N tends to be stable. Extra P can bind with ring N in a similar way when the ratio of N/P < 1 although the binding is weaker than that of extra N. Even-Z rings, as well as normal even-even nuclei, always have superimposed gravity centers of P and N; while for odd-Z rings, as well as all odd-A (A: number of nucleon) nuclei, the centers of P and N must be eccentric. The eccentricity results in a depression of binding energy (EB) and therefore odd and even Z dependent zigzag features of EB/A. This can be well explained by the shift of eccentricity by extra nucleons. Symmetrical center may present in even-Z rings and normal even-even nuclei. While for odd-Z ring, only antisymmetric center (every P can find an N through the center and vice versa) is possible. Based on this model, a pair of mirror nuclei, PX+nNX and PXNX+n, should be equivalent in packing structure just like black-white photo and the negative film. Therefore, an identical spin and parity was confirmed for any pair. In addition, the EB/A difference of mirror nuclei pair is nearly a constant of 0.184n MeV. Many other facts can also be easily understood from this model, such as the neutron halo, the unusual stability sequence of 9Be, 7Be and 8Be and so on.
EFFECT OF COATING ON THE SUPERPLASTICITY OF ISOTHERMALLY FORGED TiAl ALLOY
表面涂层对等温锻造TiAl合金超塑性的影响

ZHANG Jianmin,LI Shiqiong,ZOU Dunxu,ZHONG Zengyong,
张建民
,李世琼,邹敦叙,仲增塘

材料研究学报 , 1997,
Abstract: The effect of coating of pure aluminum on the superplasticity of isothermally forged TiAl alloy is studied by tension experiments of plate specimen at high temperatures. It is found that the superplasticity of TiAl alloy will greatly increase when the sur
ELECTRON THEORY OF THE INTRINSIC EMBRITTLEMENT OF THE INTERMETALLIC COMPOUNDS Fe-Al SYSTEM
Fe—Al系金属间化合物本征脆性的电子理论

ZHANG Jianmin,ZHONG Zengyong,ZHANG Ruilin,YU Ruihuang,
张建民
,仲增墉,张瑞林,余瑞璜

材料研究学报 , 1996,
Abstract: In the light of the valence electron structures and bond energy calculated by the empirical electron theory of solids and molecules(E.E.T),the relationship of embrittlement with the bond structures and electron distributions in Fe3Al and FeAl intermetalli
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