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The effect of prior austenite grain size on the transformation behaviour of C-Mn-Ni weld metal
Authors:R. A. Farrar  Z. Zhang  S. R. Bannister  G. S. Barritte
Affiliation:(1) Department of Mechanical Engineering, University of Southampton, UK;(2) Metrode Products Ltd, UK
Abstract:The influence of prior austenite grain size on the transformation behaviour and microstructural development of C-Mn-Ni weld metals was investigated. It was found that increasing the grain size depressed the start temperature of grain-boundary ferrite and slightly increased the acicular ferrite start temperature. The microstructural products also changed from a boundary-dominated effect in the small grain sizes, to an intragranular-dominated effect in the large grain sizes, and at the same time, the morphology of the acicular ferrite was seen to change to a larger aspect ratio.
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