Strain hardening behaviour in forming of sintered iron-0.35% carbon powder metallurgy preform during cold upsetting

Narayan, Sumesh and Ananthanarayanan, Rajeshkannan (2011) Strain hardening behaviour in forming of sintered iron-0.35% carbon powder metallurgy preform during cold upsetting. Materials Research, 14 (4). pp. 1-7. ISSN 1516-1439

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Abstract

A complete experimental investigation on the instantaneous strain-hardening behaviour of powder metallurgy preforms of Fe-0.35%C was carried out. The strain hardening behaviour of the above-mentioned P/M sintered steel preforms with aspect ratio of 0.4 and 0.6, respectively, under triaxial stress state condition was determined by cold upsetting under nil/no and graphite lubricant conditions. The instantaneous strain hardening value (ni), strength coefficient (Ki), and the stress as a function of strain and densification were obtained and analyzed. Further, a relation is obtained from a semi-log plot of stress against relative density. This was analyzed to study the hardening behaviour due to the densification as applied stress is a function of induced strain as well as of densification in the powder metallurgy materials.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
Depositing User:	Ms Shalni Sanjana
Date Deposited:	21 Jun 2011 08:58
Last Modified:	21 Jun 2012 08:58
URI:	https://repository.usp.ac.fj/id/eprint/4801

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