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Study on aging phase transformation process in Ni42 CrTiAl alloys

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电子显微学报 2001年第4期20卷 342-343页

作者： hou li-feng WEI Yinghui Hu lanqing Xu Bingshe 太原工业大学山西太原 030024

As one of the precise alloys ,constant elastic alloy is of great importance due to stability of elastic modulus and inherent frquency in a definite range of ***,the elastic modulus of common metals or alloys drops wit... 详细信息

关键词： Study on aging phase transformation process in Ni

Phase Separation Process at Early Aging Stage of Ni42CrTiAl

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材料热处理学报 2004年第5期25卷 191-194页

作者： Weiying-hui houli-feng Jiaoshao-yang Hulan-qing Xubing-she TaiyuanUniversityofTechnology TaiyuanChina

Phase separation process of Ni42CrTiAl alloy aged at various temperatures was studied by means of transmission electron microscope and X-ray diffraction. It was concluded that the temperature of spinodal decomposition is 500 °C. And the solid solution break into the lean and the rich areas, moreover the rich solute areas would have ordering arrangement to form ordering phase.

关键词：旋节线分析有序化相位变换 Ni42CrTiAl合金

Studies on Preparation of Onion-like Fullerenes by Vacuum Heat-treatment

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材料热处理学报 2004年第5期25卷 223-224页

作者： ZhangYan houli-feng WangXiao-min liuXu-guang XuBing-she CollegeofMaterialsScienceandEngineering TaiyuanUniversityofTechnologyTaiyuanShanxiChina

Onion-like Fullerenes were produced at high-temperature in vacuum. The morphology of the carbon nano onion-like fullerenes was examined and characterized by high-resolution transmission electron microscopy (HRTEM). It can be seen that the nano-sized, onion-like fullerenes possess high degree of graphization. The results suggested that the catalyst is the main factor affecting the size and yield of the fullerenes. The method is very promising for simple mass production.

关键词：球壳状碳分子真空热处理催化剂 HRTEM

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铜合金层错能的热力学计算

中国有色金属学报 2016年第11期26卷 2363-2368页

作者：侯利民侯利锋卫欢卫英慧太原理工大学材料科学与工程学院太原030034 山西工程技术学院阳泉045000

层错能是金属材料重要的本征参数,对金属材料变形机制和力学性能有着重要的影响。特别是在强烈塑性变形过程中,层错能的变化对金属变形机制和晶粒细化机制有着决定性作用。层错能的测定或计算方法有很多种,热力学法能够方便快捷地计算... 详细信息

层错能是金属材料重要的本征参数,对金属材料变形机制和力学性能有着重要的影响。特别是在强烈塑性变形过程中,层错能的变化对金属变形机制和晶粒细化机制有着决定性作用。层错能的测定或计算方法有很多种,热力学法能够方便快捷地计算出层错能的值,可以直观地判断温度、成分等对合金层错能的影响。采用热力学方法计算纯Cu及Cu-Ti、Cu-Zn合金的层错能,计算结果表明:在室温条件下,Cu-Ti和Cu-Zn合金的层错能都随溶质元素含量的增加而降低,两种合金中添加相同含量的溶质元素,溶质元素Ti对合金层错能的影响更大;两种合金偏聚自由能随溶质元素含量的增加而升高。

关键词：铜合金层错能热力学

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宝鸡峡灌区骨干渠系淤积成因及对策探讨

水利水电技术 2007年第11期38卷 84-86页

作者：李厚峰陕西省宝鸡峡管理局陕西咸阳712000

从主观和客观两方面分析了宝鸡峡灌区骨干渠系淤积成因,并提出要采取工程措施和非工程措施并举,从源头上控制泥沙入渠,从措施上减少泥沙入渠,以恢复渠道输水能力,保障灌区农田适时灌溉。

关键词：渠系淤积成因分析干渠措施宝鸡峡灌区

Microstructural Evolution of Surface Layer of TWIP Steel Deformed by Mechanical Attrition Treatment

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Journal of Iron and Steel Research International 2012年第3期19卷 38-46页

作者： li Da-zhao1,2, WEI Ying-hui1, hou li-feng1, liN Wan-ming1 (1. College of Materials and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China 2. College of Materials and Engineering, North University of China, Taiyuan 030051, Shanxi, China) [a] College of Materials and Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China [b] College of Materials and Engineering North University of China Taiyuan 030051 Shanxi China

A nanocrystalline layer was synthesized on the surface of TWIP steel samples by surface mechanical attri- tion treatment （SMAT） under varying durations. Microhardness variation was examined along the depth of the de- formation layer. Microstructural characteristics of the surface at the TWIP steel SMATed for 90 min were observed and analyzed by optical microscope, x-ray diffraction, transmission and high-resolution electron microscope. The re- sults show that the orientation of austenite grains weakens, and a-martensite transformation occurs during SMAT. During the process of SMAT, the deformation twins generate and divide the austenite grains firstly~ then a-martens- ite transformation occurs beside and between the twin bundles~ after that the martensite and austenite grains rotate to accommodate deformation, and the orientations of martensite and between martensite and residual austenite increase; lastly the randomly oriented and uniform-sized nanocrystallir^e layers are formed under continuous deformation.

关键词： SMAT technology twinning stacking fault energy deformation twin

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铜基体超音速火焰喷涂碳化物涂层界面研究

材料热处理学报 2005年第3期26卷 70-72页

作者：侯利锋卫英慧太原理工大学材料科学与工程学院山西太原030024

使用扫描电子显微镜及透射电子显微镜,对铜基体超音速火焰喷涂(HVOF)碳化物涂层的形成过程、组织结构和界面形态进行了研究。结果表明,HVOF涂层界面显微组织非常复杂,存在纳米晶、非晶和大量位错胞。非晶是粘结相在喷涂中受热、骤冷形成... 详细信息

使用扫描电子显微镜及透射电子显微镜,对铜基体超音速火焰喷涂(HVOF)碳化物涂层的形成过程、组织结构和界面形态进行了研究。结果表明,HVOF涂层界面显微组织非常复杂,存在纳米晶、非晶和大量位错胞。非晶是粘结相在喷涂中受热、骤冷形成的,而涂层中的纳米晶来自半熔碳化物的破碎。

关键词：超音速火焰喷涂(HVOF) 铜涂层界面

Influence of counter-intuitive behavior on surface nanocrystailization

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材料科学与工程（中英文版） 2008年第12期2卷 19-24页

作者： liN Wan-ming WEI Ying-hui DU Hua-yun hou li-feng XU Bing-she College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China

Banded Microstructure Formation and Its Effect on the Performance of 06Ni9 Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 325-330页

作者： liU Dong-feng 1,2,WANG Zheng-guo 1,WEI Ying-hui 1,CUI Tian-xie 2,PAN Qi-fa 2,hou li-feng 1 (1.School of Material Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China 2.Technical Center,Taiyuan Iron and Steel Group Co ltd,Taiyuan 030024,Shanxi,China) Taiyuan Univ Technol Sch Mat Sci & Engn Taiyuan 030024 Shanxi Peoples R China Taiyuan Iron & Steel Grp Co Ltd Ctr Tech Taiyuan 030024 Shanxi Peoples R China

Focusing on the banded microstructure formed during the production of 06Ni9 steels for cryo-LNG,this paper examines its formation,distribution of alloying elements,structure,hardness,and low-temperature *** results show that the banded microstructure formed after hot-rolling and cooling of the steel binct in which the element segregation occurred during *** phase change during heat treatment also can cause the formation of the banded microstructure of 06Ni9 *** white bands are mainly composed of ferrite and reversed austenite,and the black bands are mainly composed of reversed austenite and a certain amount of *** segregation and formation of more carbide caused some black regions to *** refinement of 06Ni9steel is beneficial to the formation of reversed austenite,the redistribution of alloying elements,improving the stability of austenite and the low-temperature toughness of *** steel easily undergoes nickel segregation;thus,undergoing a secondary quenching and tempering process is *** refinement of martensite quenching above A c3,the martensite that is rich in nickel and carbon,residual austenite and a few little of ferrite after secondary quenching lower than A c3 are beneficial to the formation of high stability ***,this can meet the strength and toughness requirement of the low temperature 06Ni9 steel.

关键词： 06Ni9 steel banded microstructure reversed austenite