材料期刊网

STUDY OF MICROSTRUCTURES OF DEFORMED Ti-48Al-Mn-Nb ALLOY

D Song , G.Y Zeng and X. Y Sun (Material Testing Centre , Northeastern University , Shenyang 110006 , China Manuscript received 24 August 1995 , in revised form 30 March 1996)

金属学报(英文版)

In the present paper, the microstructures of the two-phase alloy specimens of Ti-48AlMn-Nb, deformed at room temperature, 700℃and 900℃,have been investigated by using an EM400T transmission electron microscope. For specimens deformed at room temperature it is observed that (1/2) [011] superdislocation, normal (1/2) [110] dislocations, stacking fault band and a few twins etc. formed mainly in r-phase and a (1/2) [011] superdislocation preferentially decomposes into two partial dislocations with an antiphase boundary between them, which makes the dislocation difficult to move. The normal (1/2) [110] dislocations move with a long dragging tail behind them and have a low mobility In addition, the existence of a few twins implies a low mobility of (1/6) <112> twin dislocations, which leads to low plasticity of the allow. For samples deformed above 700℃,(1/2) [110] dislocations are in majority in the r-phase and exhibit short and bending dislocation segments without dragging tails,which may have resulted from an increased mobility of (1/2) [110] dislocations due to thermal activation. Meanwhile, (1/2) [011]superdislocation disappears, the mobility of (1/6)<112> dislocations is greatly increased, and thus a lot of twins are produced in r-phase. These make the plasticity of the alloy notably enhanced. The laminated structures in the alloy may be transformed into stacking fault bands during deformation at room temperature and the deformation above 700℃leads to the generation of a great quantity of twins.

关键词: : dislocation , null , null , null

Bibliography of Science and Technology of Rare Earths Published in China(1995)

王立军

中国稀土学报

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Bibliography of Science and Technology of Rare Earths Published in China(1995)

周泰禧

中国稀土学报

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Bibliography of Science and Technology of Rare Earths Published in China(1995)

康德山 , 王学业 , 陈念贻

中国稀土学报

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Morphology and Effect of Pre-deformation on Martensites by Colored Metaliography August 24,1990

GUO Yunyi ZHANG Xiumu CAO Honglu Institute of Metal Research , Academia Sinica , Shenyang , 110015 , China.To whom correspondence should be addressed.

材料科学技术（英文）

The colored metallography was used to inves- tigate the morphology of martensite in Fe-Ni-C al- loys.By compression deformation martensite trans- forms from lenticular to thin-plate.It is proved that the bended and broken martensites are inher- ent from compressive predeformation of austenite.

关键词: morphology , null , null

Manuscript Requirements

新型炭材料

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钢管内涂标准SY/T 4078-1995应尽快修订

何浩 , 王献昉 , 金华

腐蚀与防护 doi:10.3969/j.issn.1005-748X.2004.09.012

石油天然气行业标准SY/T 4078-1995<钢质管道内涂层液体涂料补口机补口工艺>在适用范围、焊口表面处理、现场施工过程及焊口补口涂层检验等部分都有不妥之处.成功的工程实例表明:无溶剂环氧树脂作为管线内壁涂层的补口涂料是非常合适的,它可以使传统的补口工艺更加科学、合理.为保证钢管内壁涂层的整体质量应尽快予以修订该行业标准.

关键词: 石油天然气 , 行业标准 , 管线 , 无溶剂环氧树脂 , 涂层

Introduction to atmospheric corrosion research in China

Science and Technology of Advanced Materials

In this paper, we introduce the research on atmospheric corrosion in China. We describe the climate characteristics and the classification of atmospheric corrosivity across the whole country. We also describe the rusting evolution under simulated wet/dry cyclic conditions. (C) 2007 NIMS and Elsevier Ltd. All rights reserved.

关键词: atmospheric corrosion;corrosivity;rusting evolution;weathering steels;rust;mechanism;so2;o-3;no2

Recent Advances of Laser Coating Technology in China

LIANG Yong LI Ruiguo Institute of Metal Research , Academia Sinica , Shenyang 110015 , ChinaInstitute of Corrosion and Protection of Metals , Aademia Sinica , Shenyang , 110015 , China

材料科学技术（英文）

Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.

关键词: laser , null , null , null , null

EFFECT OF HYDROGENATION ON THE MICROSTRRUCTURE OFTi-24Al-14Nb-3V-0.5Mo ALLOY

L. Dong , L.G. Zhou , H. Ding and C.B. Zhang(Laboratory of Atomic Imaging of Solids , Institute of Metal Research , The Chinese Academy of Sciences , Shenyang 110015 , China)(Departmeot of Material Science , Northeastern University , Shenyang 110006 , China)

金属学报(英文版)

The ebct of hydrogenation-dehydrogenation on the microstructure of forping Ti-24Al14Nb-3V-0.5MO alloy was investigated by TEM and X-ray ddection. The resultsshowed that the microstructure consists of O and B2 phases as received materials, and tmoprmation of B2 phase to O phase can be eNctively promoted 6y hydrogenation. The lamellate γ hydride was found in O phase with more hydmpen content, and this γ hydride could be decomposed by dehydmpenation treatment. The sole fine Ophase could be obtained 6y hydmpenation-dehydmpenation treatment, and two possible mechanisms for the microstructure improvetnent have been discussed on the basis of experimental results.

关键词: Ti_3Al-based alloy , null , null