Effect of preform heat treatment on the flow formability and mechanical properties of AISI4340 steel

Podder, Bikramjit; Mondal, Chandan; Kumar, K. Ramesh; Yadav, D. R.

doi:10.1016/j.matdes.2012.01.002

Cited by 32 publications

(24 citation statements)

References 18 publications

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“…Having quite high strain hardening at the beginning of deformation, this material demonstrates fast degradation of hardening, which reduces below 1 as early as 0.07 in true strain. As per the observation of Podder et al (2012), a preform with this heat treatment was successfully flow formed in two passes up to a resultant 71% of thickness reduction with no defects observed. However, it should be noted that the flow forming described in Podder et al (2012) was of a reversed type (i.e.…”

Section: Resultssupporting

confidence: 56%

“…7). To establish some numerical thresholds, it is useful to analyse hardened and tempered AISI4340, reported by Podder et al (2012). Having quite high strain hardening at the beginning of deformation, this material demonstrates fast degradation of hardening, which reduces below 1 as early as 0.07 in true strain.…”

Section: Resultsmentioning

confidence: 99%

“…As far as the authors are aware, the question about the influence of the elastic-plastic properties of the workpiece material was indirectly touched on in only two papers. Rajan et al (2002) analysed the effect of the heat treatment of AISI 4130 steel on flow formability and ten years later similar work was repeated by Podder et al (2012) for AISI 4340 steel. In both cases three heat treatments were studied: annealing, normalizing and hardening & tempering for AISI 4130; annealing, spheroidizing, hardening & tempering for AISI 4340.…”

Section: Introductionmentioning

confidence: 99%

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The effect of elasto-plastic properties of materials on their formability by flow forming

Bylya

Khismatullin

Blackwell

et al. 2018

Journal of Materials Processing Technology

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FEA process modelling, which has seen plenty of development in recent decades, has significantly simplified and broadened our capabilities for designing and optimising metal forming processes. It has become relatively easy to find the stress-strain state at any point and instant in the process, analyse the kinematics of metal flow or test different fracture criteria. However, it is frequently the case that all this information cannot compensate for the lack of a fundamental understanding of the process. Flow forming is a case in point. Although much research has been carried out since the 1960’s and has resulted in considerable industrial experience, still many aspects remain as “know how” and many basic questions do not have exact answers. This work reported herein is focused on the role of the elasto-plastic properties of a material with respect to its use in flow forming. Can the flow formability of a material be assessed using data from a uniaxial tensile test? If there exists the possibility of tailoring mechanical properties by heat treatment, what should be prioritised

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Section: Resultssupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of elasto-plastic properties of materials on their formability by flow forming

Bylya

Khismatullin

Blackwell

et al. 2018

Journal of Materials Processing Technology

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“…Highest values of feed rate combined with low reduction rate produce largest ovality. [16] assert influence of heat treatments and microstructure on ovality.…”

Section: Mechanics Of Flow Formingmentioning

confidence: 99%

A Review of Flow Forming Processes and Mechanisms

Marini

Cunningham²,

Corney

2015

KEM

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Abstract. After years of purely academic interest and niche applications, today the flow forming process is increasing demand in aerospace, automotive and defense industries. This review surveys academic paper of last fifty years, in order to evaluate the current state-of-the-art for academic and practitioner. Theoretical and experimental approaches are collected and compared by evaluating their prediction models. As a result, several knowledge gaps are identified, for example stress and strain tensors evolutions are not determined for workpiece, due to high computational cost and uncertainty about the correct finite elements approach to adopt. Similarly although, the final microstructure is often evaluated for specific cases, study of its evolution during plastic deformation has not been reported. Residual stress and final material proprieties, such as corrosion behavior, have been not studied numerically or experimentally. Tool path impact and alternative geometries are not deeply explored. Particular attention is given to process experimental optimization and characterization through Design of Experiment, which is still limited to a few papers and sometimes not well developed. The results of this review will help define a research agenda for future developments.

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“…Flow forming is a simple, chip-less and cost-effective forming process to produce tubular products with a high degree of mechanical and dimensional properties [1,2]. In flow forming a pre-form is fitted to a rotating mandrel.…”

Section: Introductionmentioning

confidence: 99%

Effect of flow forming on mechanical properties of high density polyethylene pipes

Abedini

Rahimlou

Asiabi

et al. 2015

Journal of Manufacturing Processes

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Effect of preform heat treatment on the flow formability and mechanical properties of AISI4340 steel

Cited by 32 publications

References 18 publications

The effect of elasto-plastic properties of materials on their formability by flow forming

The effect of elasto-plastic properties of materials on their formability by flow forming

A Review of Flow Forming Processes and Mechanisms

Effect of flow forming on mechanical properties of high density polyethylene pipes

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