Proposal of notch strengthening threshold criterion for ductile cast iron and relationship between notch strengthening threshold and mechanical property

Zhou, Hong Proposal of notch strengthening threshold criterion for ductile cast iron and relationship between notch strengthening threshold and mechanical property. IOP materials science and engineering, Online. (Submitted)

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Official URL: http://iopscience.iop.org/journal/1757-899X

Abstract or Summary

In this study, dynamic tensile tests were conducted at the various strain rates and temperatures for traditional ductile cast iron. Then, the notch strength " _" B" ^" notch" and the static tensile strength at room temperature " _" B, RT" ^" smooth" were discussed in terms of the strain rate-temperature parameter R, which is known to be useful for evaluating the combined influence of strain rate and temperature. This study focuses on the notch strengthening threshold R ≧ Rth where " _" B" ^" notch" is larger than " _" B, RT" ^" smooth" and therefore notched components can be used safely. In other words, if R ≧ Rth, " _" B, RT" ^" smooth" can be used to evaluate notched components in mechanical design to prevent the instantaneous fracture. In this study, it was found that the Rth value can be predicted from the static tensile property and Brinell hardness. Since the traditional ductile cast iron considered in this paper has a broad range of mechanical properties, the present approach and discussion can be applied to evaluating other materials under various temperature and strain rate.

Item Type:Other
Keywords that describe the item:ductile cast iron, notch strengthening threshold, mechanical property
Subjects:T Technology > T Technology (General)
Divisions:Schools > Centre for Engineering and Industrial Design
ID Code:5826
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Deposited On:05 Mar 2018 23:31
Last Modified:05 Mar 2018 23:31

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