马栋,王波.高热负荷作用下钨的热疲劳损伤研究[J].稀有金属材料与工程,2018,47(3):867~870.[madong,wangbo.Study on Thermal Fatigue Damage of Tungsten under High Heat Load[J].Rare Metal Materials and Engineering,2018,47(3):867~870.]
高热负荷作用下钨的热疲劳损伤研究
投稿时间:2016-01-27  修订日期:2016-03-13
中文关键词:  再结晶态钨  热疲劳损伤  粗糙度  显微硬度
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);国家重点基础研究发展计划(973计划)
中文摘要:
      利用实验室自主搭建的电子束热疲劳测试系统,研究了再结晶态钨在功率为141.5 MW/m2,不同循环次数下热疲劳损伤性能的变化规律。采用扫描电子显微镜(SEM)观测了损伤后表面形貌的变化,采用了原子力显微镜(AFM)观测了损伤表面的三维形貌的变化,同时也可以测出损伤表面粗糙度,采用了显微硬度计,测试了热疲劳损伤后晶粒表面显微硬度的变化。结果表明:随循环次数的增加,钨热疲劳损伤加剧,当循环为1000次时,钨表面已经有熔融的形貌出现;测得损伤表面的粗糙度随循环次数呈近似线性变化;损伤之后的显微硬度先升高后降低,主要是由于存在疲劳硬化的现象。
Study on Thermal Fatigue Damage of Tungsten under High Heat Load
英文关键词:Recrystallization tungsten  Thermal fatigue damage  Roughness  Hardness
英文摘要:
      The performance of thermal fatigue damage of crystalline tungsten variation at different cycles was studied in power of 141.5 MW/m2,by electron beam thermal fatigue test system which was built independently in laboratory. Changes in surface topography after thermal shock in many cycles were observed by scanning electron microscopy (SEM). Changes of three-dimensional morphology and surface roughness were detected by Atomic force microscope (AFM).and the surface hardness was tested after thermal fatigue. Results show that: with the increase of the cyclic number, thermal fatigue damage intensifies. The surface roughness measured with changes linearly with the cyclic number; the surface hardness increased firstly then decreased because of the performance of fatigue hardening.
作者单位E-mail
马栋 北京工业大学 madong@emails.bjut.edu.cn 
王波 北京工业大学 wangbo@bjut.edu.cn 
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