Thermodynamic Analysis of the Fracture Inheritance in Overheated Steels

Abstract

Abstract: Based on the experimental result that Cr and C segregated on the prior grain boundaries of austenite in overheated steels,causing the inheritance of fracture mode after re-austeni- tization,a thermodynamic analysis is conducted through the calculation of equilibrium segregation amount of Cr and C in grain boundary at 860 and 1050℃ and the segregation kinetics of Cr is also calculated.Thermodynamic calculation gives an evidence that the segregation of Cr and C at grain boundaries may be regarded as one of the mechanisms of the fracture inheritance in overheated steels.

Key words: fracture inheritance, overheated steel, segregation, thermodynamic calculation

LI Lin T.Y.Hsu Shandong Polytechnic University,China.. Thermodynamic Analysis of the Fracture Inheritance in Overheated Steels[J]. J Mater Sci Technol, 1989, 5(3): 157-160.

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Thermodynamic Analysis of the Fracture Inheritance in Overheated Steels

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