Influence of hot working on microstructure and mechanical behavior of high nitrogen stainless steel

Hong, C.M.; Shi, Jie; Sheng, Li Yuan; Cao, Wenquan; Wang, Hui; Han, Dong

doi:10.1007/s10853-011-5439-2

Cited by 18 publications

(17 citation statements)

References 16 publications

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“…This kind of ferrite was hard to remove completely during the following hot rolling and annealing process. The similar phenomenon was reported by Hong et al [19]. The XRD profile, shown in Fig.…”

Section: Resultssupporting

confidence: 89%

Microstructural evolution and mechanical properties of friction stir welded joint of Fe–Cr–Mn–Mo–N austenite stainless steel

Wang

Xiao

et al. 2014

Materials & Design

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Section: Resultssupporting

confidence: 89%

Microstructural evolution and mechanical properties of friction stir welded joint of Fe–Cr–Mn–Mo–N austenite stainless steel

Wang

Xiao

et al. 2014

Materials & Design

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“…The fracture location was located in the WZ. 19,39,40 The volume of plasticised material and plastic flow during forging increased with the friction time. As shown in Figure 24(d), the heat distribution of the joint was uniform, and an adequate volume of material was plasticised owing to the sufficient accumulation of friction heat.…”

Section: Tensile Strengthmentioning

confidence: 99%

Effects of joint heat distribution on material flow and microstructure in continuous drive friction welding of 45 # steel

Zhang

Deng

Zhan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Continuous drive friction welding (CDFW) is an economical and productive method for joining similar metals. In this study, 45 # steel was joined via CDFW, and the material heat distribution, flow behaviour, flash formation and fracture mode were investigated via experiments and simulations. The bar was divided into three zones in the direction of radius (R), the R zone near the axis, the edge zone at the edge of the R and the 0.5 R zone between the R zone and edge zone. The maximum flow velocity and temperature of the joint first appeared in the 0.5 R zone, and as the friction continued, the maximum temperature moved to the edge zone, followed by flash. When the friction time was 9 s, the maximum tensile strength was 674 MPa, the fracture mode was the coexistence of ductile and brittle and the fracture location had an obvious boundary. Ductile fracture occurred in the R zone, and the flash took a lot of heat, brittle fracture occurred in the 0.5 R and edge zones. The maximum microhardness of the joint is 295 HV in the weld zone, and the microhardness decreased in the partially deformed zone. When the friction time was appropriate, the heat distribution was uniform and sufficient, and the grains exhibited a significant degree of dynamic recrystallisation refinement.

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“…High-nitrogen nickel-free austenitic stainless steels (nitrogen content is usually larger than ∼ 0.4% in mass percent, termed as HNSs) as one group of the important engineering materials have obtained great attentions owing to their excellent mechanical properties, i.e. improved strength and ductility, adequate workhardening ability, high fracture toughness and desirable resistance to corrosion, etc [1][2][3][4][5][6][7][8][9][10][11]. These attractive properties depend on the benefit roles of nitrogen in enhancing solid-solution strengthening and stabilising austenitic structure [1,[3][4][5][6]8].…”

Section: Introductionmentioning

confidence: 99%

“…improved strength and ductility, adequate workhardening ability, high fracture toughness and desirable resistance to corrosion, etc [1][2][3][4][5][6][7][8][9][10][11]. These attractive properties depend on the benefit roles of nitrogen in enhancing solid-solution strengthening and stabilising austenitic structure [1,[3][4][5][6]8]. The high content of nitrogen in austenitic structure would replace expensive nickel and offer an additional advantage of costsaving [1,3,4,6,8].…”

Section: Introductionmentioning

confidence: 99%

“…These attractive properties depend on the benefit roles of nitrogen in enhancing solid-solution strengthening and stabilising austenitic structure [1,[3][4][5][6]8]. The high content of nitrogen in austenitic structure would replace expensive nickel and offer an additional advantage of costsaving [1,3,4,6,8]. Moreover, the enhanced solubility of nitrogen with increasing the contents of alloying elements, i.e.…”

Section: Introductionmentioning

confidence: 99%

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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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Influence of hot working on microstructure and mechanical behavior of high nitrogen stainless steel

Cited by 18 publications

References 16 publications

Microstructural evolution and mechanical properties of friction stir welded joint of Fe–Cr–Mn–Mo–N austenite stainless steel

Microstructural evolution and mechanical properties of friction stir welded joint of Fe–Cr–Mn–Mo–N austenite stainless steel

Effects of joint heat distribution on material flow and microstructure in continuous drive friction welding of 45 # steel

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

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