Effect of cold rolling on mechanical properties and ballistic performance of nitrogen-alloyed austenitic steels

Singh, B. Bhav; Sivakumar, K.; Bhat, T. Balakrishna

doi:10.1016/j.ijimpeng.2008.07.082

Cited by 31 publications

(9 citation statements)

References 7 publications

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“…Amid cold working, some metastable austenitic phases mutate to the strain-induced martensitic (SIM) phase which renders high strength to ASS. The stability of martensite at room temperature and percentage reduction in cold rolling are some of the parameters over which the formation of SIM depends (Talha et al , 2015; Bhav Singh et al , 2009; Murata et al , 1993). During the microstructural examination of cold-rolled ASS, some researchers found that there exists two types of martensite structures when the austenitic phase mutates to SIM phase.…”

Section: Introductionmentioning

confidence: 99%

Study of strain induced martensite and its reversal on sensitization behaviour of metastable austenitic stainless steel

Wanjari

Patil

Singh³

et al. 2022

ACMM

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Purpose The purpose of the present study is to investigate the effects of strain-induced martensite (SIM) and its reversal on metastable austenitic stainless steel (MASSs) through the analysis of metallurgical and sensitisation behaviour. Design/methodology/approach In the present investigation, the samples of Cr-Mn ASS (also known as MASSs) including 15%, 30% and 50% cold worked, solution annealed samples with and without thermal ageing (at 700°C for 3 h) were analysed with the help of X-ray diffraction analysis, microstructure examination and electrochemical behaviour. The scanning electron microscope (SEMJOEL 6380 A) was used to examine the microstructure of the sample, and the double-loop electrochemical potentiokinetic reactivation test was used to determine the degree of sensitisation (DOS) in the samples. The cold worked solution annealed samples without thermal ageing are named as CR15, CR30 and CR50, respectively, and the samples with thermal ageing are named as CR15_TA, CR30_TA and CR50_TA, respectively. Findings In CR15, CR30 and CR50 samples, the DOS increased with increase in the extent of cold working, which was attributable to passivation deterioration. Because of the high degree of passivation at the grain boundaries, the DOS of CR15_TA and CR30_TA were practically identical. The DOS in the CR50_TA sample, on the other hand, was lowered due to SIM recovery in the austenite. Originality/value The present study sheds light on how to choose the right cold working percentage to avoid sensitisation in MASSs during the fabrication of metal forming components.

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Section: Introductionmentioning

confidence: 99%

Study of strain induced martensite and its reversal on sensitization behaviour of metastable austenitic stainless steel

Wanjari

Patil

Singh³

et al. 2022

ACMM

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“…Many attempts have been made to study the tensile mechanical properties and the microstructure evolution of the HNSs or other nitrogen alloyed austenitic stainless steels for extending their engineering applications [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. These studies suggested that the plastic deformation and fracture behaviour of these steels depended on various kinds of internal and external factors, such as grain size [12,16], twin structure (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…These studies suggested that the plastic deformation and fracture behaviour of these steels depended on various kinds of internal and external factors, such as grain size [12,16], twin structure (e.g. size, shape and amount of twin) [17,[23][24][25], allying elements (e.g. contents of carbon and nitrogen) [13][14][15]21,26,30,31] and testing temperature and strain rate [18][19][20]22,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Plastic deformation and fracture behaviour of high-nitrogen nickel-free austenitic stainless steel

Sun

et al. 2017

Materials Science and Technology

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The plastic deformation and fracture behaviour of a high-nitrogen nickel-free austenitic stainless steel were examined by performing tensile testing at room temperature and at a wide strain rate range. The tensile testing demonstrated that this steel shows a significant strain rate dependence of the strength and ductility. With increasing strain rate from 10−4 to 1 s−1, the yield strength increases from 673 to 801 MPa and the ultimate tensile strength increases from 958 to 1003 MPa; the uniform elongation decreases from 75 to 44% and the total elongation decreases from 86 to 58%. The analysis of the stress–strain curve by using the Ludwigson equation showed that this steel exhibits a two-stage strain hardening behaviour, the strain hardening exponents at low and high strain regions ([Formula: see text] and [Formula: see text]) and the transition strain ([Formula: see text]) decrease with increasing strain rate. Based on the analysis results of the stress–strain curve, the transmission electron microscopy characterisation of the microstructure and the scanning electron microscopy observation of the deformation and fracture surfaces, the significant strain rate dependence of the strength and ductility of this steel was discussed and connected with the variation in the dislocation activity with strain rate.

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“…16,17 Moreover, recent investigations concerning the cold rolling of HNSS revealed the formation of deformation twins and slip lines. 9,18 The microtwins can block dislocation motion and thus induce the increase in strength. Based on these results, we can envisage obtaining an HNSS with higher stress by cold deformation, especially considering the fact that HNSS exhibit excellent workhardening ability by the introduction of N. However, the relevant literatures are still quite limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of cold rolling on tensile properties and microstructure of high nitrogen alloyed austenitic steel

Sun

Jiang

et al. 2014

Materials Science and Technology

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The cold rolling strain effect on the tensile properties of a high nitrogen alloyed austenitic steel was systemically investigated. Quasi-static tensile experiments were performed on the samples with different cold rolling strain. The material possessed good balance between strength and ductility in the entire rolling strain range. Mechanical property and microstructure of the nitrogen alloyed austenitic steel were greatly affected by cold rolling strain. With the increase in cold rolling strain, the strength increased sharply but the ductility declined. That is related to the gradual changes of microstructure induced by the cold rolling process. The cold rolling process leads to substantial microstructural change, from the appearance of slip bands and twins at low cold rolling strain; the microtwins formation at intermediate cold rolling strain and followed by sequences of their bending, breaking and disappearance; and finally to the formation of drossy twins at the high cold rolling strain.

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Effect of cold rolling on mechanical properties and ballistic performance of nitrogen-alloyed austenitic steels

Cited by 31 publications

References 7 publications

Study of strain induced martensite and its reversal on sensitization behaviour of metastable austenitic stainless steel

Study of strain induced martensite and its reversal on sensitization behaviour of metastable austenitic stainless steel

Plastic deformation and fracture behaviour of high-nitrogen nickel-free austenitic stainless steel

Effect of cold rolling on tensile properties and microstructure of high nitrogen alloyed austenitic steel

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