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闫五柱,李有亮,温志勋,邹邵华,段祖航.晶体取向对镍基单晶高温合金纳米压痕行为的影响[J].稀有金属材料与工程(英文),2020,49(6):1854~1859.[Yan Wuzhu,Li Youliang,Wen Zhixun,Zou Shaohua and Duan Zuhang.Effect of crystallographic orientation on nano-indentation behaviors of Nickel based single crystal super alloys[J].Rare Metal Materials and Engineering,2020,49(6):1854~1859.]
Effect of crystallographic orientation on nano-indentation behaviors of Nickel based single crystal super alloys
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Received:September 11, 2019  Revised:April 28, 2020
DOI:
Key words: Nano-indentation  single crystal super alloys  crystallographic orientation  crystal plasticity theory
Foundation item:国家自然科学基金(51905432),陕西省自然科学基础研究计划(2018JQ1030),航空科学基金(2016ZD53036),中央高校基本科研业务费(310201906zy002)
Author NameAffiliation
Yan Wuzhu,Li Youliang,Wen Zhixun,Zou Shaohua and Duan Zuhang  
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Abstract:
      In order to investigate the effect of crystallographic orientation on the nano-indentation behaviors of single crystal super alloys, the nano-indentation experiments with a Berkovich indenter in an atomic force microscope were carried out on [001], [011] and [111] oriented Nickel based single crystal super alloys. Experimental results showed that the indentation load-depth curve, hardness and elastic modulus were remarkably influenced by crystallographic orientation. It is found that the shape and volume fraction of γ^" strengthening phase is dependent on crystallographic orientation, which will influence the mechanical properties. The nano-indentation experiments performed on three typical crystallographic orientations were simulated by using crystal plasticity theory to investigate the indentation responses and the resolved shear stress induced by indentation, and the simulation results showed a good agreement with the experiment results.