Structure-Property Relationship of Cu-Al-Ni-Fe Shape Memory Alloys in Different Quenching Media

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• 作者：Safaa N. Saud (1)
  E. Hamzah (1)
  T. Abubakar (1)
  S. Farahany (1)
  
• 关键词：Cu ; Al ; Ni ; Fe ; quenching media ; shape memory alloys ; thermal treatment ; transformation temperature
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：23
• 期：1
• 页码：255-261
• 全文大小：812 KB
• 作者单位：Safaa N. Saud (1)
  E. Hamzah (1)
  T. Abubakar (1)
  S. Farahany (1)
  
  1. Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
  
• ISSN：1544-1024

文摘

This paper presents the effects of heat treatments using various quenching media on the phase transformation parameters and microstructure parameters. The effects of different quenching methods, step-quenched and up-quenched, in various media were evaluated by using differential scanning calorimetry, field emission electron microscopy, energy-dispersive spectrometry, atomic force microscopy, x-ray diffraction, and Vicker’s hardness. The variations of the structure and properties of Cu-Al-Ni-Fe shape memory alloys were linked to the variations of morphology, type, and stabilization of the obtained phase. From the DSC results, the use of ice water as a quenching medium produced the highest transformation temperatures, while a brine solution-quenching medium resulted in the highest change of the entropy and enthalpy. Additionally, it was found that the best grain refinement was observed through the use of an oil-quenching medium, due to its high cooling rate.