The methods for determining the extent of deformation a metal can withstand before cracking or fracture occurs are reviewed. Flow stress data are essential in the development of constitutive equations and processing maps. One of the requirements for process modelling is a knowledge of the material flow behavior for defining the deformation maps that delineate `safe' and `non-safe' hot working conditions. These maps show in the processing space, the processing conditions for stable and unstable deformation.

Bhagwati P. Kashyap

Department of Metallurgical & Materials Engineering

IIT Jodhpur

S.V.S. Narayana Murty

B. Nageswara Rao

&ldquo;IIT Jodhpur is committed to impart quality education to facilitate the creation of qualified, competent and responsible human resources to meet the emerging technological challenges of the world. It is working towards creating an equitable learning platform that is positive, accessible and effective in the face of the modern societal and scientific advancements.

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Journal	International Materials Reviews
Publisher	Inst of Materials, London
ISSN	09506608