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用納米壓痕儀測量Cu50Zr43Ti7非晶合金的硬度和彈性模量
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江西省自然科學(xué)基金(2007GZC0712)資助


Measurements of Hardness and Elastic Modulus by Nanoindenter for Cu50Zr43Ti7 Amorphous Alloy
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    摘要:

    用Berkovich和Cube-Corner壓頭分別測量了Cu50Zr43Ti7非晶合金的硬度(H)和彈性模量(E)。結(jié)果發(fā)現(xiàn)，該合金的H和E與壓頭形狀及測量所用載荷無關(guān)，H=(6.5±0.2) GPa，E=(114.4±2.1) GPa；相對于Berkovich壓頭，用Cube-Corner壓頭得到的壓痕周圍觀察到較多的剪切帶。該合金沒有硬度的尺寸效應(yīng)，變形也沒有明顯的加工硬化。用有限元(FE)計(jì)算得到該合金的屈服強(qiáng)度(s)約為1.8 GPa，與壓縮試驗(yàn)結(jié)果相符。

    Abstract:

    Nanoindentation tests have been performed for Cu50Zr43Ti7 bulk metallic glass with a Berkovich indenter and a cube-corner indenter, respectively. It is found that the measured hardness (H) of (6.5±0.2) GPa and the elastic modulus (E) of (114.4±2.1) GPa are independent of the indenter tip shape and the applied indentation loads used in the tests. Many shear bands were observed around the impressions by the cube-corner indenter if compared to with the Berkovich indenter for the alloy without the indentation-size effect (ISE) and strain hardening during the indentation tests. The yield strength (s) of the alloy is about 1.8 GPa by finite element (FE) calculation, good agreement with the experimental results.

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黎業(yè)生,李 洪,馬永紅,謝 駿,王家佳.用納米壓痕儀測量Cu50Zr43Ti7非晶合金的硬度和彈性模量[J].稀有金屬材料與工程,2009,38(1):147~150.[Li Yesheng, Li Hong, Ma Yonghong, Xie Jun, Wang Jiajia. Measurements of Hardness and Elastic Modulus by Nanoindenter for Cu50Zr43Ti7 Amorphous Alloy[J]. Rare Metal Materials and Engineering,2009,38(1):147~150.]
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  • 收稿日期:2008-01-18
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