Title:
METHOD FOR EVALUATING BRITTLE CRACK ARREST PERFORMANCE OF THICK STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2022/259957
Kind Code:
A1
Abstract:
Provided is a method for evaluating the brittle crack arrest performance of a thick steel plate. The thick steel plate brittle crack arrest performance that would be obtained using a large-scale test is estimated by using a Charpy impact test, which is a small-scale test, to evaluate a characteristic value at each of a plate-thickness central position and a plate-thickness intermediate position exhibiting a fracture surface morphology different to that at the plate-thickness central position, and combining temperatures (transition temperatures) at which the obtained predetermined characteristic values are exhibited. An evaluation is performed at the plate-thickness central position using an energy transition temperature Tct of a press-notch Charpy impact test, and an evaluation is performed at the plate-thickness intermediate position using a fracture surface transition temperature Tmt of a V-notch Charpy impact test, and a transition temperature Tw (=Ymt+B1×Tct) obtained by combining these transition temperatures is used to estimate the brittle crack arrest performance of the thick steel plate. The brittle crack arrest performance of the thick steel plate can thus be evaluated simply and accurately. It should be noted that Tw=(Tmt+Tct)/2+B2×(Tct-Tmt) may be used as the combined transition temperature Tw.
Inventors:
TAJIKA HISAKAZU (JP)
HANDA TSUNEHISA (JP)
TAGAWA TETSUYA (JP)
NAGAO RYOTA (JP)
HANDA TSUNEHISA (JP)
TAGAWA TETSUYA (JP)
NAGAO RYOTA (JP)
Application Number:
PCT/JP2022/022514
Publication Date:
December 15, 2022
Filing Date:
June 02, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
G01N3/31
Foreign References:
| JP2011033457A | 2011-02-17 | |||
| JP2015135324A | 2015-07-27 | |||
| JP2003226931A | 2003-08-15 | |||
| JP2010230666A | 2010-10-14 | |||
| JP2008214654A | 2008-09-18 | |||
| JP2008046106A | 2008-02-28 | |||
| JP2012052873A | 2012-03-15 | |||
| JP2014145131A | 2014-08-14 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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