Work-hardening behaviour of nitrogen-alloyed austenitic stainless steels

Soussan, A.; Degallaix, Suzanne; Magnin, T.

doi:10.1016/0921-5093(91)90655-7

Cited by 87 publications

(42 citation statements)

References 9 publications

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“…The physical interpretation of flow curve parameters has been given earlier. [20,23] While K in the Ludwigson equation expresses the ability of strengthening by deformation, K 1 signifies the short-range stress inducing the movement of first mobile dislocation, n shows the intensity of work hardening, and n 1 expresses the rate at which the ratio between the short-range and long-range stress decreases. The critical strain e c is the strain below which planar slip is prevalent and above which multiple slip becomes dominant.…”

Section: Discussionmentioning

confidence: 99%

Work-Hardening Behavior of the Ni-Fe Based Superalloy IN718

Kumar

Sastry

Singh

2007

Metall Mater Trans A

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Flow behavior of many metals and alloys in the region of uniform plastic strain is normally expressed by the simple power law relationship (r = Ke p n ). However, deviations have been observed from such behavior in several fcc metallic materials with low stacking fault energy. The age-hardenable nickel-iron base superalloy IN718 is also observed not to obey the simple power law relationship either in the solution treated as well as in the different age-hardened conditions. Various flow relationships were used to obtain the best fit for the experimental data, and different relationships were identified for the different heat-treated conditions. Detailed transmission electron microscopy (TEM) examination of the tensile-tested samples, interrupted after different amounts of strain, revealed inhomogeneous deformation by planar slip in all the heattreated conditions. Cold rolling, however, was found effective in eliminating the unusual plastic flow behavior, observed in the as-heat-treated conditions.

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Section: Discussionmentioning

confidence: 99%

Work-Hardening Behavior of the Ni-Fe Based Superalloy IN718

Kumar

Sastry

Singh

2007

Metall Mater Trans A

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“…Soussan et al 13) and Simmons 14) have ever used the modified Ludwik relation to simulate the work hardening behavior of 316LN alloys containing nitrogen up to 0.25 wt% and Fe-l7Cr-(8-10)Mn-5Ni alloys with nitrogen contents varying from less than 0.2 to almost 1 wt%, respectively. It was reported that the work hardening behavior of all these materials could be simulated using the modified relation, and the influence of nitrogen content on the modeling parameters (i.e.…”

Section: ¹1mentioning

confidence: 99%

“…K 1 , n 1 , K 2 , n 2 ) has been discussed in detail. Also, Soussan et al 13) defined an additional parameter, the transition strain (¾ L ), as the strain, at which the departure parameter (") is very small in comparison with the Ludwik term. They obtained ¾ L by using the following equation:…”

Section: ¹1mentioning

confidence: 99%

“…13) Moreover, it is known that traditional austenitic stainless steels normally contain Ni element, which would unfortunately cause allergic reactions in the human body during implantation; therefore, Ni-free HNASSs would also have the great potential in practical medical applications. 4,5) Apparently, a clear understanding of the mechanical deformation behavior of such HNASSs is of particular importance for their engineering and medical applications.…”

Section: Introductionmentioning

confidence: 99%

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Plastic Deformation and Damage Behaviors of Fe-18Cr-18Mn-0.63N High-Nitrogen Austenitic Stainless Steel under Uniaxial Tension and Compression

et al. 2015

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Uniaxial tensile and compressive deformation behaviors of Fe-18Cr-18Mn-0.63N high-nitrogen austenitic stainless steel were investigated at different strain rates. It is found that, with increasing strain rate, the yield strength of the steel increases either under tension or compression, while the ultimate tensile strength and the total elongation decrease under tension. The plastic deformation behavior prior to necking under uniaxial tension at different strain rates can be well described by the modified Ludwik relation. Under tensile deformation at the low strain rate of 10 ¹4 s ¹1, microcracks prefer to initiate around the Al 2 O 3 particles in the steel, whereas cracks nucleate at grain boundaries or along slip bands at the high strain rate of 10 ¹2 s ¹1. Compressive deformation behavior of the steel is not so sensitive to the strain rate. The surface fluctuation is more serious under compressive deformation rather than tensile deformation. The tensile plastic deformation is mainly governed by the formation of planar slip bands and deformation twins, and deformation by twinning becomes more prominent with increasing strain rate, while dislocation slip featured by planar slip bands, dislocation bands and twin-like bands basically controls the compressive plastic deformation, and deformation twins are rarely formed.

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“…austenite and precipitated carbides. In solid particle erosion, austenite is considered to be a beneficial constituent because (i) austenite is plastic and tough; (ii) the strength at the interface between carbide and austenite is high (Xi and Zhou 1993) and (iii) localized strength of austenite increases with strain hardening (Soussan and Degallaix 1991). The better erosion resistance of 21-4-N steel is also due to the distribution of hard carbides (M 7 C 3 ) in the matrix of austenite.…”

Section: Effect Of Microstructurementioning

confidence: 98%

Erosion behaviour of hydro turbine steels

2008

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The martensitic stainless steel (termed as 13/4) is currently being used for fabrication of underwater parts in hydroelectric projects. There are, however, several maintenance problems associated with the use of this steel. A nitronic steel (termed as 21-4-N) has been developed as an alternative with the specific aim of overcoming these problems. A comparative study has been made on the erosion behaviour of 13/4 and 21-4-N steels by means of solid particle impingement using gas jet. The eroded surfaces after erosion tests were analysed by scanning electron microscopy. It is observed that the 21-4-N nitronic steel possesses better resistance to erosion in comparison to 13/4 martensitic stainless steel. The austenitic matrix of the nitronic steel possesses high hardness, high tensile toughness and work hardening ability, which results in higher erosion resistance.Keywords. In situ strain hardening; solid particle erosion; tensile toughness; 13/4 martensitic stainless steel; 21-4-N nitronic steel.

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Work-hardening behaviour of nitrogen-alloyed austenitic stainless steels

Cited by 87 publications

References 9 publications

Work-Hardening Behavior of the Ni-Fe Based Superalloy IN718

Work-Hardening Behavior of the Ni-Fe Based Superalloy IN718

Plastic Deformation and Damage Behaviors of Fe-18Cr-18Mn-0.63N High-Nitrogen Austenitic Stainless Steel under Uniaxial Tension and Compression

Erosion behaviour of hydro turbine steels

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