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WC-20(Fe/Co/Ni)硬质合金断裂韧性的一种测定方法和断裂模式研究

童国权, 王尔德, 何绍元

童国权, 王尔德, 何绍元. WC-20(Fe/Co/Ni)硬质合金断裂韧性的一种测定方法和断裂模式研究[J]. 粉末冶金技术, 1995, 13(1): 38-43.
引用本文: 童国权, 王尔德, 何绍元. WC-20(Fe/Co/Ni)硬质合金断裂韧性的一种测定方法和断裂模式研究[J]. 粉末冶金技术, 1995, 13(1): 38-43.
Tong Guoquan, Wang Erde, He Shaoyuan. STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE[J]. Powder Metallurgy Technology, 1995, 13(1): 38-43.
Citation: Tong Guoquan, Wang Erde, He Shaoyuan. STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE[J]. Powder Metallurgy Technology, 1995, 13(1): 38-43.

WC-20(Fe/Co/Ni)硬质合金断裂韧性的一种测定方法和断裂模式研究

详细信息
    作者简介:

    童国权,博士研究生,现从事陶瓷超塑性的研究

STUDY ON TESTING METHOD AND FRACTURE MODE OF WC-20(Fe/Co/Ni) CEMENTED CARBIDE

  • 摘要: 用电火花加工的单边缺口试样,外推得到WC-20(Fe/Co/Ni)硬质合金的平面应变断裂韧性KIc,发现表观裂纹扩展能量释放率GQ(ρ)与试样缺口根部曲率半径ρ呈线性关系,即GQ(ρ)=GIC+Aρ。在扫描电镜下观察断口形貌,认为有4种断裂模式:粘结相撕裂、WC晶粒解理断裂、WC-WC晶界开裂和WC-粘结相边界开裂,讨论了各种断裂模式的断裂过程。
    Abstract: The plane strain fracture toughness KIC of WC-20 (Fe/Co/Ni) cemented carbides was obtained on single-edge notched specimen machined by electric discharge usiny extrapolation. The results showed a linear correlation between appearance strain energy release rate GQ(ρ) and curvature radius ρ of the specimen notch, i. e. GQ(ρ)=GIC +Aρ. By observation of fracture morphology using scanning electionic microscope, 4 kinds of fracture modes were considered:ductile rupture in binder phase,WC grain cleavage,intergranular fracturee along WC grain boundary and fracture near the interface of WC/binder. The fracture process of various fracture modes has been discussed.
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出版历程
  • 收稿日期:  1994-04-18
  • 网络出版日期:  2021-08-01

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