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Volume 3, Issue 1 (December 2014)
Estimation of ASTM E1921 Master Curve of Ferritic Steels From Instrumented Impact Test of CVN Specimens Without Precracking
(Received 21 October 2013; accepted 14 May 2014)
Published Online: 23 June 2014
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A semi-empirical cleavage fracture stress (CFS) model, mainly depending on the CFS, σf, has been derived for estimating the ASTM E1921 reference temperature (T0) and demonstrated for ferritic steels with yield strength in the range 400–750 MPa. This requires only instrumented impact test of CVN specimens without precracking and static yield stress data. The T0 estimate based on the CFS model, TQcfs, lies within a ±20°C band, being conservative for most of the steels, but less conservative than TQIGC based on the IGC-procedure (see Nomenclature for definition). Applicability and acceptability of the present calibration curves for highly irradiated steels need further examination.
Sreenivasan, P. R.
Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Resaearch, Kalpakkam, Tamilnadu
Stock #: MPC20130079
Title Estimation of ASTM E1921 Master Curve of Ferritic Steels From Instrumented Impact Test of CVN Specimens Without Precracking