An evaluation of crack growth behavior for silicone nitride subjected to double torsion and vickers indentation by means of acoustic emission monitoring.

DOI Web Site Web Site

Bibliographic Information

Other Title
  • ＡＥを利用した窒化けい素のダブルトーション試験およびビッカース試験におけるき裂進展挙動の評価
  • AE オ リヨウシタ チッカ ケイソ ノ ダブル トーション シケン オヨビ

Search this article

Abstract

An attempt has been made to estimate the indentation cracking process from the information of acoustic emission monitoring. The relations between crack propagation velocity and acoustic emission threshold in terms of double torsion testing were first investigated. The results indicated that the crack propagation velocity was approximately proportional to the acoustic emission rate. These relations were applied directly to the analysis of the indentation. Various loading speeds and loading levels were selected. Assuming that the radial crack with semi-circular only occurs during indentation process, the crack length should be given as a function of the acoustic emission rate. From the results of calculating the extent of crack propagation obtained by the acoustic emission counts for the indentation, good agreements were obtained between predicted and measured crack length. Fracture toughness values obtained by these testings were also compared.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top