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GROWTH OF THERMOELASTIC MARTENSITE

DENG Yongrui University of Science and Technology Beijing , Beijing , ChinaG.S.Ansell Colorado School of Mines , Golden , CO 80401 , USA) Associate professor , Department of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , China.

金属学报(英文版)

The growth of thermoelastic martensite in a Cu-29% Zn-3% Al alloy has been investigated experimentally and theoretically.Metallographie observations showed that the growth oc- cured thermoelastically,i.e.reversibly,in the radial direction as well as in the thickening di- rection.This is not consistent with the theories of Conhen and some others.A model has been suggested to explain the thermoelasticity of the growth.The basic idea is:the elastic strain distribution is highly heterogeneous and the growth is controlled by the local elastic strain en- ergy at the growth frontier area.The calculated results from the model based on Eshelby's theory are consistent with the observations.

关键词: thermoelasticity , null , null

Titanium technology in the USA - an overview

D.Eylon , S.R.Seagle

材料科学技术(英文)

The state of Ti research, development and industry is reviewed in this article. The fifty-year anniversary of Ti technology commercialization in the USA provides an opportunity for a historical perspective. Incorporation of "information-age" tools into alloy development, processing, and production invigorates the technology. Consolidation, diversification and globalization have been transforming the Ti industry in the recent years.

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SUBSTRUCTURE ALTERATION OF STAINLESS STEEL DURING CONSTANT STRAIN FATIGUE

WANG Jingyi Xi'an Institute of Technology , Xi'an , ChinaTAN Yuxu MA Zenghai Xi'an Jiaotong University , Xi'an , China Institute of Mealic Materials and Strength , Xi'an Jiaotong University , Xi'an 710049 , China

金属学报(英文版)

The alteration of substructure of an austenitic stainless steel has been investigated during con- stant strain fatigue.No plateau stage on the cyclic stress-strain curve was observed for the stainless steel in contrast with a monocrystalline pure copper specimen.This may relate to its low stacking fault energy.During strain fatigue under various amplitudes the substructure of dislocation in austenite alterates correspondingly.It revealed to associate with the appearance change of the cyclic stress-strain curve.

关键词: austenitic strainless steel , null , null

FLOTATION-SPECTROPHOTOMETRIC DETERMINATION OF TRACES OF PHOSPHORUS IN IRON, NICKEL, COBALT, COPPER AND ZINC USING MOLYBDATE AND MALACHITE GREEN

Fresenius Journal of Analytical Chemistry

A sensitive method for the determination of traces of P in Fe, Ni, Co, Cu and Zn is based on the formation of an ion-associate with molybdate and malachite green, whose absorbance is measured at 620 nm. The calibration curve is linear up to 0. 1 0-mu-g/ml; molar absorptivity is 2.7 x 10(5) l mol-1 cm-1. It was found that commonly coexisting elements did not interfere.

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A BIBLIOMETRIC ANALYSIS OF THE GLOBAL LITERATURE IN THE CORROSION FIELD FROM 1992 TO 2007

Corrosion Reviews

The corrosion field experienced a rapid growth in knowledge and innovations in the last decade. In this paper, a bibliometric analysis was applied to evaluate the global scientific production of corrosion papers (46,384 pieces) front 1992 to 2007 in all journals of all the subject categories of the Science Citation Index Expanded (SCIE) compiled by the Institute for Scientific Information (ISI), Philadelphia, USA. The analysis of the published Outputs showed that research on corrosion increased steadily over the past 16 years and the researchers from the EU, the USA and China contributed greatly to the rise in publications. Synthetically analyzing the information including international cooperation, subject category, distribution Of journals, document type, document language and author keywords, the development of corrosion research over the past 16 years has been visualized and several key findings were provided. This bibliometric method can help relevant researchers realize the panorama of global corrosion research, and establish the further research direction.

关键词: Corrosion;Bibliometrics;Research trends

Relationship of Fatigue Crack Propagation to Dislocation Structure and Slip Geometry

Campbell Laird(Dept. of Materials Science & Engineering , University of Pennsylvania , Philadelphia , PA 19104-6272 , USA)Pedro Peralta(Center for Materials Science , Los Alamos National Laboratory , MaU Stop K765 , Los Alamos , NM 87545-0001 , USA)

材料科学技术(英文)

The mechanisms of fatigue crack propagation are breifly reviewed in relation to Professor McClintock's contributions to the early development of the field. The most securely established understanding has been obtained for those mechanisms of propagation involving plasticity-inducedgeometrical changes to the crack tip during tensile and compressive straining (the plastic blunting process). The roles of more complex factors in controlling the kinetics of crack propagation,which cause the magnitude of the Paris exponent to exceed 2, remain to be elucidated. Recentlyobtained results revealing the interconnection between the slip behaviour at the crack tip, theplastic blunting process and the dislocation structures present in the material before the crackencounters them are reported.

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