国家自然科学基金(50771036)

作品数:7被引量:13H指数:3
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相关作者:徐庭栋王凯宋申华王民庆更多>>
相关机构:钢铁研究总院哈尔滨工业大学更多>>
相关期刊:《Science China(Technological Sciences)》《Journal of Iron and Steel Research International》《材料科学与工艺》更多>>
相关主题:SEGREGATION非平衡晶界偏聚GRAIN_BOUNDARY非平衡偏聚回火脆性更多>>
相关领域:一般工业技术金属学及工艺理学动力工程及工程热物理更多>>
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Nonequilibrium Grain Boundary Segregation of Sulfur and Its Effect on Intergranular Corrosion for 304 Stainless Steel被引量:4
《Journal of Iron and Steel Research International》2011年第6期61-66,共6页WANG Kai XU Ting-dong SHAO Chong YANG Chun 
Item Sponsored by National Natural Science Foundation of China(50771036,51001030)
The data obtained by bending tests for intergranular embrittlement after 45 h and 450 h exposure to Strauss solution have been reported for 304 stainless steel. The results show that an embrittlement peak appears at ...
关键词:stainless steel intergranular corrosion nonequilibrium segregation grain boundary SULFUR 
Nonequilibrium Grain Boundary Segregation of Phosphorus in Ni-Cr-Fe Superalloy被引量:1
《Journal of Iron and Steel Research International》2011年第1期61-67,共7页WANG Kai SI Hong YANG Chun XU Ting-dong 
Item Sponsored by National Natural Science Foundation of China(50771036,51001030)
In virtue of Auger electron spectroscopy, the grain boundary concentrations of phosphorus in Ni-Cr-Fe superalloy are measured after solution treatment at 1 180 ℃ for 45 min. The results show that a peak of phosphorus...
关键词:nonequilibrium segregation grain boundary PHOSPHORUS nickel based superalloy 
磷的非平衡晶界偏聚现象及对回火脆性的影响被引量:5
《材料科学与工艺》2009年第6期882-888,共7页王凯 王民庆 徐庭栋 
国家自然科学基金资助项目(50771036)
为确定304L钢中P的偏聚特征,分析了Briant在俄歇能谱(AES)下得到的磷晶界偏聚浓度.研究表明,经1100℃固溶1h、水淬后的304L不锈钢,不仅在700℃恒温时效过程中出现磷的晶界偏聚浓度峰值,并在500、550、600、650、700℃分别恒温时效100h后...
关键词:晶界 非平衡偏聚  304L不锈钢 回火脆性 
非平衡晶界偏聚的研究进展(Ⅱ):晶界滞弹性弛豫的微观机制和解析表述
《中国科学(E辑)》2009年第8期1367-1374,共8页徐庭栋 王凯 宋申华 
国家自然科学基金(批准号:50771036)资助项目
内耗实验发现晶界滞弹性弛豫峰,是上世纪内耗研究的重要进展之一,但是晶界弛豫的微观机制仍然不清楚.通过弹性应力引起溶质晶界偏聚或贫化实验,提出晶界滞弹性弛豫的微观机制是:弹性张应力引起晶界吸收空位,压应力引起晶界发射空位,并...
关键词:晶界 偏聚 滞弹性弛豫 动力学 
溶质非平衡晶界偏聚的研究进展(Ⅰ):热循环引起的非平衡偏聚和晶间脆性断裂被引量:1
《中国科学(E辑)》2009年第7期1199-1210,共12页徐庭栋 王凯 宋申华 
国家自然科学基金(批准号:50771036)资助项目
评述了溶质非平衡晶界偏聚理论的近20年来的发展,包括非平衡偏聚的临界时间概念和公式,热力学关系式和恒温动力学方程.作为这个理论体系的重要应用,讨论了钢的回火脆性和金属与合金的中温脆性的非平衡偏聚机理.
关键词:晶界偏聚 回火脆性 中温脆性 
Theoretical progress in non-equilibrium grain-boundary segregation (II):Micro-mechanism of grain boundary anelastic relaxation and its analytical formula
《Science China(Technological Sciences)》2009年第6期1679-1687,共9页XU TingDong WANG Kai SONG ShenHua 
Supported by the National Natural Science Foundation of China(Grant No.50771036)
Finding the internal-friction peak of grain boundary anelastic relaxation was one of the important breakthroughs in the study of internal friction in the last century.But the micro-mechanism of grain boundary anelasti...
关键词:grain boundary SEGREGATION anelastic RELAXATION kinetics 
Theoretical progress in non-equilibrium grain-boundary segregation (Ⅰ): Thermally induced non-equilibrium grain-boundary segregation and intergranular embrittlement被引量:3
《Science China(Technological Sciences)》2009年第4期893-905,共13页XU TingDong1, WANG Kai1 & SONG ShenHua2 1 Central Iron and Steel Research Institute, Superalloy Department, Beijing 100081, China 2 Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China 
Supported by the National Natural Science Foundation of China (Grant No. 50771036)
The research progress of non-equilibrium grain-boundary segregation theories in the last 20 years is reviewed. Based on studies by the present authors, the critical time of non-equilibrium segregation and its impact o...
关键词:GRAIN-BOUNDARY SEGREGATION EMBRITTLEMENT 
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