29Zr32Ti15Al5Ni19分別在載荷控制模式、連續(xù)剛度模式和循環(huán)加載模式下進(jìn)行了研究。該合金在納米壓入過程中會(huì)發(fā)生Pop-in現(xiàn)象,且載荷大小比加載速率對(duì)Pop-in現(xiàn)象的影響更大。當(dāng)載荷超過40mN時(shí),即使采用高達(dá)5mN/s的加載速率仍然可以觀察到Pop-in現(xiàn)象。該合金存在壓痕尺寸效應(yīng),其測(cè)試納米硬度隨載荷的增大而下降,其Meyer指數(shù)(n)小于2。壓入過程中的能量耗散分?jǐn)?shù)(Ed)在54%-60%之間變化。循環(huán)加載測(cè)試結(jié)果顯示該合金加工硬化效應(yīng)明顯。"/>

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玻璃態(tài)Cu29Zr32Ti15Al5Ni19在納米壓入過程中的壓痕尺寸效應(yīng)及應(yīng)變硬化現(xiàn)象
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作者單位:

1.南京工程學(xué)院材料工程學(xué)院;2.江蘇大學(xué)材料科學(xué)與工程學(xué)院

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中圖分類號(hào):

TG 14

基金項(xiàng)目:

國(guó)家自然科學(xué)基金項(xiàng)目 (51601089)；江蘇省大學(xué)生創(chuàng)新訓(xùn)練項(xiàng)目(TB201702018)


Indentation size effects and strain hardening of glassy Cu29Zr32Ti15Al5Ni19 during nanoindentation
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Affiliation:

School of Materials Engineering,Nanjing Institute of Technology

Fund Project:

National Natural Science Foundation of China；Innovation Training Program for College Students in Jiangsu Province

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    摘要:

    利用納米壓痕技術(shù)對(duì)高熵非晶合金Cu29Zr32Ti15Al5Ni19分別在載荷控制模式、連續(xù)剛度模式和循環(huán)加載模式下進(jìn)行了研究。該合金在納米壓入過程中會(huì)發(fā)生Pop-in現(xiàn)象,且載荷大小比加載速率對(duì)Pop-in現(xiàn)象的影響更大。當(dāng)載荷超過40mN時(shí),即使采用高達(dá)5mN/s的加載速率仍然可以觀察到Pop-in現(xiàn)象。該合金存在壓痕尺寸效應(yīng),其測(cè)試納米硬度隨載荷的增大而下降,其Meyer指數(shù)(n)小于2。壓入過程中的能量耗散分?jǐn)?shù)(Ed)在54%-60%之間變化。循環(huán)加載測(cè)試結(jié)果顯示該合金加工硬化效應(yīng)明顯。

    Abstract:

    A high entropy bulk metallic glass (HE-BMG) Cu29Zr32Ti15Al5Ni19 was investigated by nanoindentation in detail with load-controlled, continuous stiffness measurement (CSM) and cyclic loading mode, respectively. Pop-in occurs in this alloy during nanoindentation. Applied load have more influences on the pop-in events than loading rate does. When the applied load is larger than 40mN, obvious pop-in events can be observed in the loading curves even at high up to 5mN/s loading rate. Indentation size effect exists in this alloy, confirmed by the hardness decreasing with the increasing indentation load and a Meyer’s index n less than 2. The fraction of energy dissipated during indentation (Ed) changes within the range of 54%-60%. Cyclic loading tests reveal obvious hardening effect.

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皮錦紅,嚴(yán)亞楠,汪榮香,吳繼禮.玻璃態(tài)Cu29Zr32Ti15Al5Ni19在納米壓入過程中的壓痕尺寸效應(yīng)及應(yīng)變硬化現(xiàn)象[J].稀有金屬材料與工程,2019,47(3):744~750.[Jin-Hong Pi, Ya-Nan Yan, Rong-Xiang Wang, Ji-Li Wu. Indentation size effects and strain hardening of glassy Cu29Zr32Ti15Al5Ni19 during nanoindentation[J]. Rare Metal Materials and Engineering,2019,47(3):744~750.]
DOI：10.12442/j. issn.1002-185X.20170914

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  • 收稿日期:2017-10-11
  • 最后修改日期:2019-02-20
  • 錄用日期:2017-12-13
  • 在線發(fā)布日期: 2019-04-10
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