张冠群,王智,胡愿,张卫文,李元元.高能球磨Ti55.5Cu18.5Ni17.5Al8.5合金非晶化研究[J].稀有金属材料与工程,2018,47(5):1550~1554.[Guanqun Zhang,Zhi Wang,Yuan Hu,Weiwen Zhang,Yuanyuan Li.Amorphization Tendencyof Ti55.5Cu18.5Ni17.5Al8.5 Alloy by High Energy Ball Milling[J].Rare Metal Materials and Engineering,2018,47(5):1550~1554.]
高能球磨Ti55.5Cu18.5Ni17.5Al8.5合金非晶化研究
投稿时间:2017-08-01  修订日期:2017-10-12
中文关键词:  高能球磨  钛基非晶合金  纳米晶  非晶化  硬度
基金项目:广东省自然科学基金研究团队资助项目(2015A030312003);中央高校基本科研业务费专项资金资助
中文摘要:
      采用机械合金化(MA)制备出Ti55.5Cu18.5Ni17.5Al8.5非晶粉末。利用X射线衍射仪(XRD)、示差扫描量热分析仪、扫描电镜、透射电镜等研究了不同球磨时间粉末的微观形貌以及非晶化行为,探讨了非晶化对合金硬度的影响。结果表明,首先随着球磨时间的增加,微观组织的演变规律是合金晶粒逐渐变小,出现纳米晶化合物;随后纳米晶化合物内部发生局部结构长程无序化,纳米晶化合物分割成更为细小的纳米晶;最终纳米晶颗粒完全非晶化。从原子尺度证明了非晶化的主要原因是高能球磨过程中发生了剧塑性变形,形成了高密度位错以及严重的晶格畸变,最终导致原子长程无序化从而形成非晶。球磨引起加工硬化和非晶晶化,使得球磨后的合金粉末硬度显著增加。
Amorphization Tendencyof Ti55.5Cu18.5Ni17.5Al8.5 Alloy by High Energy Ball Milling
英文关键词:high energy ball milling  Ti-based amorphous alloy  nanocrystalline  amorphization  hardenss
英文摘要:
      :Ti55.5Cu18.5Ni17.5Al8.5amorphous powders were produced by mechanical alloying process. The microstructure, amorphization behavior and hardness were studied by X-ray diffraction, differential scanning calorimetry, scanning electronic microscopy and transmission electron microscopy, et al. The results show that the microstructure changed significantly with increasing milling time. Firstly grain size decreased and nanometric intermetallic appeared. Secondly long range disordered structure occured inside the nanometric intermetallics with further milling. Finally the intermetalics were separated into many smaller parts by the disordered structure and then amorphization. The amorphization mechaniam was stuied at atomic scale and shows that the major reason is the server plastic deformation occurred during high energy ball milling, leading to high density of dislocation and large lattice distortaion, which results into long range disordered structure and amorphous structure. The alloy’s hardness increases significantly with milling owing to the work hardening and amorphization during ball milling.
作者单位E-mail
张冠群 华南理工大学 国家金属材料近净成形工程技术研究中心 zgq773814868@163.com 
王智 华南理工大学 国家金属材料近净成形工程技术研究中心 wangzhi@scut.edu.cn 
胡愿 华南理工大学 国家金属材料近净成形工程技术研究中心  
张卫文 华南理工大学 国家金属材料近净成形工程技术研究中心  
李元元 华南理工大学 国家金属材料近净成形工程技术研究中心  
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