The effect of microstructure and strain rate on the stage III strain hardening and ductility of dual-phase steels

Nagorka, M.S.; Krauß, G.; Matlock, David K.

doi:10.1016/0025-5416(87)90332-6

Cited by 13 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…workers [20,21,22] and other groups. [23,24] It assumes the power Other characteristics of the stress-strain curves, such as their Ludwik relation, ϭ 0 ϩ k n [1] where is the true stress, is the true strain, n is the work- In a ln (d/d)-ln plot, the slope of the line gives (n Ϫ 1), while its intersection with ln ϭ 0 (i.e., ϭ 1) provides ln of steels were investigated in the present study.…”

Section: Introductionmentioning

confidence: 99%

Tensile stress-strain analysis of single-structure steels

Umemoto

Tsuchiya

Liu

et al. 2000

Metall Mater Trans A

View full text Add to dashboard Cite

In an effort to establish a universal model to predict the mechanical properties from processing conditions, tensile tests have been conducted of four single-structure steels, namely, ferrite, pearlite, bainite, and martensite; the data obtained were analyzed in terms of the Ludwik, Hollomon, and Swift equations to characterize their work-hardening behavior. It was found that the differential Crussard-Jaoul (C-J) analysis, based on the Ludwik equation, can describe the work-hardening behavior of these steels fairly well.The differential C-J analysis has shown that the ferrite and pearlite steels deform with two stages of work hardening, each stage associated with a distinctive value of the work-hardening exponent n. Martensitic steels exhibit single-stage work hardening. In bainite, the behavior was found to be dependent on transformation temperature; upper and lower bainite exhibit a behavior similar to pearlitic steels and quenched martensite, respectively. This can be well understood in terms of the similarity of the corresponding microstructures.On the basis of these results, the work-hardening behavior of single-structure steels falls into four categories, according to the n value. This classification may serve as a useful guide to predict the flow behavior of steels with a known microstructure or to judge the microstructure merely by stressstrain curves, without microstructural observations.

show abstract

Section: Introductionmentioning

confidence: 99%

Tensile stress-strain analysis of single-structure steels

Umemoto

Tsuchiya

Liu

et al. 2000

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…The Differential Crussard-Jaoul (C-J) Analysis. Several authors have used the differential C-J analysis [21] of the σ-ε curves of metals and alloys to determine significant variations of the work hardening exponent [22][23][24][25]. A Ludwik power relationship [8] is assumed:…”

Section: Methods Of Analysismentioning

confidence: 99%

Determination of the Work Hardening Exponent by the Hollomon and Differential Crussard-Jaoul Analyses of Cold Drawn Ferrite-Pearlite Steels

Mejı́a

Maldonado

Benito

et al. 2006

MSF

View full text Add to dashboard Cite

This research work analyses the effect of cold working level produced by drawing, on the work hardening exponent of 0.18 and 0.43 % C ferrite-pearlite steels. Such analysis is carried out by means of true stress-true strain curves derived from uniaxial tension tests. The work hardening exponent behaviour was determined by using Hollomon and differential Crussard-Jaoul models. It is found that the work hardening exponent decreases as a function of the applied cold-drawing level, and negative values were obtained when differential analysis is used. The results indicate that the Hollomon analysis shows some deviations from the experimentally determined true stress - true strain curves while the differential Crussard-Jaoul analysis fits better when two work hardening exponents are considered. This analysis establishes two exponents for different stages of plastic deformation which are determined by the sharp slope change in the plot of ln (d σ/d ε) - ln ε.

show abstract