Journal Published Online: 01 January 1992
Volume 20, Issue 1

Determination of Ductile-Brittle Transition Temperature (DBTT) in Dynamic Small Punch Test

CODEN: JTEVAB

Abstract

A dynamic small punch test technique is demonstrated for measuring the ductile-brittle transition temperature (DBTT) of aged Cr-Mo-V turbine rotor steels. Based on fracture energy measurements and fracture surface observations it is shown that the dynamic small punch test specimens exhibit a clear ductile-brittle transition behavior. The DBTT can be determined reliably by statistically analyzing the scatter in the fracture energy data and by defining the fracture appearance transition temperature. The measured values of DBTT are compared with those obtained from Charpy impact tests.

Author Information

Joo, Y-H
Research Institute for Fracture Technology, Tohoku University, Aza Aoba Aramaki Aobaku, Sendai, Japan
Hashida, T
Research Institute for Fracture Technology, Tohoku University, Aza Aoba Aramaki Aobaku, Sendai, Japan
Takahashi, H
Research Institute for Fracture Technology, Tohoku University, Aza Aoba Aramaki Aobaku, Sendai, Japan
Pages: 9
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Stock #: JTE11891J
ISSN: 0090-3973
DOI: 10.1520/JTE11891J