材料期刊网，材料期刊，材料类期刊，材料期刊投稿

Isothermal Aging Kinetics in CuZnAl Shape Memory Alloy

Zengqi ZHAO Lab.of Physics , Baotou Research Institute of Rare Earth , Baotou , 014010 , ChinaFeixia CHEN Dazhi YANG Dept.of Mater.Eng. , Dalian University of Technology , Dalian , 116024 , ChinaEr BAO Dept.of Mater.Eng. , Yanshan University , Qinhuangdao , 066004 , China

材料科学技术（英文）

Isothermal aging behaviours of a CuZnAl shape memory alloy have been investigated by means of dilatometry.The length of the specimens during isothermal aging from 190 to 280℃ increases with the aging time at each temperature.The isothermal aging kinetics fits in Avrami equation and the time exponent n decreases with the increase in aging temperature.The apparent activation energy for the isothermal aging process was measured to be 109.0kJ/mol,which is about equal to that of a relaxation internal friction peak at about 200℃ (f≈1 Hz) in the alloy.

关键词: isothermal aging kinetics , null , null , null , null

MISCIBLE PRECIPITATES IN V-Ti-N MICROALLOYED STEELS

TANG Guoyi ZHENG Yangzeng Yanshan University , Qinhuangdao , ChinaCAI Qigong ZHU Jing Central Iron and Steel Research Institute , Beijing , China ZHENG Yangzeng Professor , Department of Material Engineering , Yanshan University , Qinhuangdao , China

金属学报(英文版)

The characteristics and the formation of the miscible particles in V-Ti-N microalloyed steels were studied.It was found that the vanadium to form V-Ti miscible particles starts to precipi- tate after pouring and cooling to temperature below 11 50℃ by means of the epitaxial precipi- tation on the pre-existing titanium nitrides.The vanadium content in the particles is markedly influenced by the cooling rate after solidification.

关键词: microalloyed steel , null , null

TUDY OFSTRAIN INDUCED MARTENSITE TRANSFORMATION FOR A MEDIUM MANGANE SESTEEL

M.Zhang Section of Scientific Research , Yanshan University , Qinhuangdao 066004 , China

金属学报(英文版)

The distribution of Cand Mn atomsinthe austenitic matrix isheterogeneous,the Mn atoms tendtooccupythefirst neighbour position ofthe Catomsin theaustenite. During deforma tion thethreekindsof martensitearestraininduced , havinginternal magneticfield valuese qualto33 0T, 30 5Tand 28 2Trespectively, andthe martensiteisstraininduced firstin the austenitecontainingless Cand Mn atoms.

关键词: medium manganese steel , null , null

Superplasticity in Aluminium Brass(HAl 66-6-3-2)

By SHEN Huanxiang GAO Shiyou SU Shenggui ** Dept.of Materials Engineering , Yanshan University , Qinhuangdao.066004 , China+ To whom correspondence should be addressed

材料科学技术（英文）

关键词: superplasticity , null , null

University of Science and Technology Beijing

JIA Shizhen University of Science and Technology Beijing , China.

材料科学技术（英文）

关键词:

Online Shape Dynamic Wrapping Angle Compensation Model of Cold Strip

YANG Li-po , YU Bing-qiang , YU Hua-xin

钢铁研究学报(英文版)

In specific condition, when wrapping angle of cold rolling strip covering surface of shape detecting roll dynamically changes, online radial compression of the shape detecting roll is changed too, and it seriously affects online shape detecting precision of cold strip. Based on the latest intelligent shape meter developed by Yanshan University, using PSO-BP neural network and actual working condition datum, the cold strip online dynamic wrapping angle compensation model is established, and successfully applied in 1250 mm 6-high cold mill, remarkable results are achieved. The error between calculated values and measured values of total tensions is within 3%.

关键词: cold rolling strip , shape detecting , wrapping angle , compensation , shape meter , cold mill