Constrained groove pressing of low carbon steel: Nano-structure and mechanical properties

Khodabakhshi, F.; Kazeminezhad, M.; Kokabi, A.H.

doi:10.1016/j.msea.2010.03.005

Cited by 113 publications

(85 citation statements)

References 39 publications

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“…Similar behaviour of enhanced lattice strain isotropy with increasing strain has been observed in aluminium processed by equal channel angular pressing (Korchef et al, 2007). Moreover, earlier study (Khodabakhshi et al, 2010) on the evolution of strain homogeneity in constrained groove pressed low carbon steel sheets showed improved strain homogeneity at higher number of CGP passes; which is in good agreement with the results obtained in the present study.…”

Section: X-ray Profile Analysissupporting

confidence: 92%

“…Among the various techniques, Williamson-Hall (W-H) method (Williamson and Hall, 1953) is used extensively for determining the crystallite sizes in severe plastically deformed bulk polycrystalline materials like aluminium alloy processed by mechanical alloying (Ortiz and Shaw, 2004) and pure aluminium processed by ECAP (Rebhi et al, 2009). Recently W-H method have also been used successfully for evaluating the crystallite sizes of CGP processed aluminium ) and low carbon steel (Khodabakhshi et al, 2010). The Williamson-Hall equation used in the present study is expressed as follows:…”

Section: Analysis Of X-ray Diffraction Profilementioning

confidence: 99%

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Mechanical behaviour and microstructural evolution of constrained groove pressed nickel sheets

Kumar

Raghu

2013

Journal of Materials Processing Technology

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Section: X-ray Profile Analysissupporting

confidence: 92%

Section: Analysis Of X-ray Diffraction Profilementioning

confidence: 99%

Mechanical behaviour and microstructural evolution of constrained groove pressed nickel sheets

Kumar

Raghu

2013

Journal of Materials Processing Technology

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“…Generally, this strengthening is introduced by work hardening and grain refinement. Previous papers proposed flow softening and microcracking as softening mechanisms [8][9][10]. Figure 5a and b illustrates the microstructures of pressed copper after one and three passes, respectively.…”

Section: Processing Efficiencymentioning

confidence: 98%

Numerical and Experimental Study on Constrained Groove Pressing

Guan¹,

Wang²

2017

Severe Plastic Deformation Techniques

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Constrained groove pressing (CGP) is a new severe plastic deformation method suitable for producing ultra-fine grained sheet metals. Based on Taguchi optimization method, the influence of processing parameters such as groove width, groove angle, friction coefficient and deformation rate on deformation homogeneity of constrained groove pressing (CGP) was studied numerically utilizing DEFORM-3D. A multi-pass CGP was carried out on 1060 commercially pure aluminium, copper and Ni sheets. Through a series of experimental research, the evolution of microstructure, tensile properties, forming load, and die parameters during the process was investigated.

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“…Teflon layers were used as the lubricant between the samples and the dies. More details of the CGP method are given in 19,20 . For ultra-rapid annealing, the samples were machined from both sides up to a thickness of 1.8 mm, and then cut into specimens with a width of 14 mm.…”

Section: Experimental Partmentioning

confidence: 99%

Grain-refining ability of ultra-rapid annealing for low-carbon steel: severe plastic deformation

Mostafaei¹,

Kazeminezhad²

2017

Mater. Tehnol.

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To study the grain-refinement ability of ultra-rapid annealing (URA), heating rates from 0.3°C/s up to 1200°C/s with conventional annealing and URA in the intercritical temperature range were performed on severely deformed low-carbon steel. The results show that recrystallization in conventional annealing is completed below the critical temperature of Ac1 without grain refinement. URA up to 730°C at a heating rate of 200°C/s causes grain refinement due to full interaction between the recrystallization and phase transformation. URAs up to 730°C with heating rates of 600°C/s and 1000°C/s lead to partial grain refinement and no grain refinement, respectively. During annealing with a heating rate of 1200°C/s, the temperature should reach 760°C for the occurrence of recrystallization leading to grain refinement. The sample URAed at 600°C/s up to 730°C shows the maximum hardness due to fine grains being partially formed. Keywords: conventional annealing, ultra-rapid annealing, interaction, severe plastic deformation Za {tudij sposobnosti udrobnjenja zrn pri zelo hitrem`arjenju, so bile uporabljene hitrosti segrevanja od 0,3°C/s do 1200°C/s pri obi~ajnem in zelo hitrem`arjenju v interkriti~nem temperaturnem obmo~ju na mo~no deformiranem malooglji~nem jeklu. Rezultati ka`ejo, da je rekristalizacija pri konvencionalnem`arjenju zaklju~ena pod kriti~no temperaturo Ac1 brez udrobnjenja zrn. Zelo hitro`arjenje do 730°C pri hitrosti ogrevanja 200°C/s povzro~i udrobnjenje zrn, zaradi polne interakcije med rekristalizacijo in fazno premeno. Zelo hitro`arjenje do 730°C , s hitrostjo ogrevanja 600°C/s in 1000°C/s povzro~i delno udrobnjenje zrn oz. udrobnjenja zrn ni. Med ogrevanjem s hitrostjo 1200°C/s je potrebno dose~i temperaturo 760°C, da se pojavi rekristalizacija, ki povzro~i udrobnitev zrn. Vzorec po zelo hitrem`arjenju z 600°C/s do 730°C ka`e maksimalno trdoto zaradi delnega nastanka drobnih zrn.

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Constrained groove pressing of low carbon steel: Nano-structure and mechanical properties

Cited by 113 publications

References 39 publications

Mechanical behaviour and microstructural evolution of constrained groove pressed nickel sheets

Mechanical behaviour and microstructural evolution of constrained groove pressed nickel sheets

Numerical and Experimental Study on Constrained Groove Pressing

Grain-refining ability of ultra-rapid annealing for low-carbon steel: severe plastic deformation

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