Advances in Manufacturing ›› 2018, Vol. 6 ›› Issue (4): 376-383.doi: 10.1007/s40436-018-0234-9

• ARTICLES • 上一篇    下一篇

Investigation into the room temperature creep-deformation of potassium dihydrogen phosphate crystals using nanoindentation

Yong Zhang1,2, Ning Hou1,2,3, Liang-Chi Zhang3   

  1. 1 School of Mechatronics Engineering, The Harbin Institute of Technology, Harbin 150001, People's Republic of China;
    2 Ministry of Education Key Laboratory of Micro-systems and Micro-structures Manufacturing, The Harbin Institute of Technology, Harbin 150001, People's Republic of China;
    3 Laboratory for Precision and Nano Processing Technologies, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
  • 收稿日期:2018-04-20 修回日期:2018-09-28 出版日期:2018-12-25 发布日期:2018-12-08
  • 通讯作者: Ning Hou,houning3393@163.com;Liang-Chi Zhang,liangchi.zhang@unsw.edu.au E-mail:houning3393@163.com;liangchi.zhang@unsw.edu.au
  • 基金资助:
    This work was financially sponsored by the National Nature Science Foundation of China (Grant Nos. 51875137 and 51375122), Heilongjiang Natural Science Foundation (Grant No. E2018033) and Australian Research Council (Grant No. DP170100567).

Investigation into the room temperature creep-deformation of potassium dihydrogen phosphate crystals using nanoindentation

Yong Zhang1,2, Ning Hou1,2,3, Liang-Chi Zhang3   

  1. 1 School of Mechatronics Engineering, The Harbin Institute of Technology, Harbin 150001, People's Republic of China;
    2 Ministry of Education Key Laboratory of Micro-systems and Micro-structures Manufacturing, The Harbin Institute of Technology, Harbin 150001, People's Republic of China;
    3 Laboratory for Precision and Nano Processing Technologies, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
  • Received:2018-04-20 Revised:2018-09-28 Online:2018-12-25 Published:2018-12-08
  • Contact: Ning Hou,houning3393@163.com;Liang-Chi Zhang,liangchi.zhang@unsw.edu.au E-mail:houning3393@163.com;liangchi.zhang@unsw.edu.au
  • Supported by:
    This work was funded as part of the DFG Project "Efficient determination of Stability Lobe Diagrams" (Grant No. BR 2905/73-1).

摘要: It has been a tremendous challenge to manufacture damage-free and smooth surfaces of potassium dihydrogen phosphate (KDP) crystals to meet the requirements of high-energy laser systems. The intrinsic issue is whether a KDP crystal can be plastically deformed so that the material can be removed in a ductile mode during the machining of KDP. This study investigates the room temperature creep-deformation of KDP crystals with the aid of nanoindentation. A stress analysis was carried out to identify the creep mechanism. The results showed that KDP crystals could be plastically deformed at the nanoscale. Dislocation motion is responsible for creep-deformation. Both creep rate and creep depth decrease with decrease in peak force and loading rate. Dislocation nucleation and propagation bring about pop-ins in the loaddisplacement curves during nanoindentation.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-018-0234-9

关键词: Potassium dihydrogen phosphate (KDP) crystals, Creep-deformation, Stress, Dislocation

Abstract: It has been a tremendous challenge to manufacture damage-free and smooth surfaces of potassium dihydrogen phosphate (KDP) crystals to meet the requirements of high-energy laser systems. The intrinsic issue is whether a KDP crystal can be plastically deformed so that the material can be removed in a ductile mode during the machining of KDP. This study investigates the room temperature creep-deformation of KDP crystals with the aid of nanoindentation. A stress analysis was carried out to identify the creep mechanism. The results showed that KDP crystals could be plastically deformed at the nanoscale. Dislocation motion is responsible for creep-deformation. Both creep rate and creep depth decrease with decrease in peak force and loading rate. Dislocation nucleation and propagation bring about pop-ins in the loaddisplacement curves during nanoindentation.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-018-0234-9

Key words: Potassium dihydrogen phosphate (KDP) crystals, Creep-deformation, Stress, Dislocation