Community Research and Development Information Service - CORDIS

Abstract

Elementally substituted high Mn, high N steels have been studied as potential low activation replacements for austenitic stainless steels of the types AISI 316, 320, 321 and FV548. The approach to the metallurgical design of the compositions and prediction of the basic properties is outlined. Experimental casts of the proposed alloys were prepared and their microstructural constitution, stability, and basic mechanical properties investigated. The stability against martensitic transformations under deformations and refrigeration was examined. Ageing at 400 degrees, 650 degrees and 900 degrees following solution treatment at 1150 degrees C resulting in a fine grain boundary precipitation of TaC accompanied by intragranular and, in some cases, limited sigma and Laves phase precipitation. Proof stress values of 470-610 MPa and tensile strengths of 750-1000 MPa were obtained and a high tensile ductility was observed. Fatigue resistance appeared to be similar to that of the established steels but the creep rupture strength was lower than expected.

Additional information

Authors: BOTT A H, SHEFFIELD CITY POLYTECHNIC (UK);CULHAM LABORATORY, ABINGDON (UK);PICKERING F B, SHEFFIELD CITY POLYTECHNIC (UK);CULHAM LABORATORY, ABINGDON (UK);BUTTERWORTH G J SHEFFIELD CITY POLYTECHNIC (UK), SHEFFIELD CITY POLYTECHNIC (UK);CULHAM LABORATORY, ABINGDON (UK);CULHAM LABORATORY, ABINGDON (UK), SHEFFIELD CITY POLYTECHNIC (UK);CULHAM LABORATORY, ABINGDON (UK)
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P772, 1986
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top