Strain partition, uniform elongation and fracture strain in dual-phase steels
作者： Y.L. Su , J. Gurland
DOI: 10.1016/0025-5416(87)90507-6
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摘要: Abstract Heat treatment of a commercial dual-phase steel by either intercritical annealing or step quenching produced steels the same compositions but different amounts and morphologies martensite ferrite. The average local surface strains in alloy were evaluated microscopically during tensile deformation several step-quenched means fine grid applied photolithography. strain ratio ϵ α / m (where ferrite martensite) increases with increasing content strain. derived stress ration σ , measure load transfer, decreases is fairly constant It shown analytically experimentally that uniform may be regarded as force-weighted situ necking constituents (after Garmong Thompson), if linearly dependent on constituents' Also, descriptive expression was which relates fracture to strain-hardening parameter alloy, void fraction rate increase expressions for also describe behavior spheroidized steels.
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