Dynamic Strain Aging Behaviour in AISI 316L Austenitic Stainless Steel under As-Received and As-Welded Conditions

Muhamed, Guma Alnaji; Gündüz, Süleyman; Erden, Mehmet Akif; Taştemür, Demet

doi:10.3390/met7090362

Cited by 14 publications

(7 citation statements)

References 18 publications

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“…2). The results of this study are similar to those of Muhamed et al [20]. The authors investigated the DSA behaviour of 316L ASS and subjected the samples to a hot tensile test in the 25-800°C range.…”

Section: Resultssupporting

confidence: 88%

Effect of Grain Size and Deformation Temperature on Mechanical Properties and Failure Behaviour of 316L Austenitic Stainless Steel

Katiksiz¹,

Gündüz²

2021

Metallofiz. Noveishie Tekhnol.

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In this work, the effects of grain size and deformation temperature on mechanical properties and failure behaviour of 316L austenitic stainless steel (ASS) are investigated. The cold, warm and hot deformation are carried out at temperatures of 25, 500, and 800°C for the strain rate of 1⋅10 −3 s −1 . The results show that strength and workhardening index of all samples decrease with increasing test temperature; however, decrement in strength and workhardening index is more less in coarse grained samples compared to the finer grained samples. This is due to dynamic strain ageing (DSA) occurred in the coarse grained samples which showed more pronounced serrated behaviour after testing at 500 or 800°C due to interaction of mobile dislocations and solute atoms.

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Section: Resultssupporting

confidence: 88%

Effect of Grain Size and Deformation Temperature on Mechanical Properties and Failure Behaviour of 316L Austenitic Stainless Steel

Katiksiz¹,

Gündüz²

2021

Metallofiz. Noveishie Tekhnol.

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Section: Introductionmentioning

confidence: 99%

“…It is well known that Mo dramatically reduces the carbon diffusion coefficient in ferrite 7,8 and slows down iron self-diffusion. 9,10 In complex alloy steels, the diffusion mobility of carbon can be two times lower than that in simple ferrite. It is clear that Mo avoids brittleness due to another mechanism besides its effect on carbide diffusion.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, its use in many industrial areas such as aerospace, defense, automotive, energy, and petrochemicals is increasing, depending on new research and innovations on alloy steels. [4][5][6][7][8][9] The yield strength of the alloyed steels can be improved by strengthening mechanisms. For example, the most effective strength-increasing mechanisms in alloyed steels are related to refining the grain size and precipitation hardening.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mo addition on microstructure, mechanical and machinability properties of Cr-PM steels

Erden

Akgün

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this work, it was investigated the effect of molybdenum (Mo) addition on machinability, mechanical properties, and microstructure of Cr steels produced by using powder metallurgy method. Tensile and hardness experiments were applied to define the mechanical properties of the produced Cr-PM steels. The machining experiments have been also performed without coolant on a CNC vertical machining center at three different cutting speeds (150, 210, and 270 m/min), two different feed rates (0.4 and 0.8 mm/tooth), and constant depth of cut (0.5 mm). The machinability of the alloys was evaluated in regard to surface roughness (Ra) and tool wear (Vb). The results indicated that that Cr-PM steel with 5% Mo addition by weight had the highest yield, tensile strength, and hardness, and the best surface quality was obtained in this sample in terms of surface roughness. However, according to Vb measurement results, the cutting performance of the cutting inserts wasnegative affected by MoC(N), CrC(N), and MoCrC(N) precipitates formed in the microstructure of PM steel.

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“…Literature studies have shown that the PLC effect occurs not only in copper, aluminum and nickel alloys [2][3][4]17,18], but also in some steel grades. Plastic instability phenomenon was observed in steels with increased Cr content [7,19], austenitic stainless steels [20], Hadfield steels [21] and dual phase (DP) steels [22]. Some of the AHSSs are also prone to plastic instability phenomenon, such as high-manganese Twinning-Induced Plasticity (TWIP) steels [8], medium-manganese steels [6,13] and Q&P steels [10].…”

Section: Introductionmentioning

confidence: 99%

Explanation of the PLC Effect in Advanced High-Strength Medium-Mn Steels. A Review

et al. 2019

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The paper reviews the recent works concerning the Portevin-Le Chatelier (PLC) effect in Advanced High-Strength Steels (AHSSs) with a special attention to high-strength medium-manganese steels. Theories explaining the mechanism of the plastic instability phenomenon in steels with medium-and high-Mn contents were discussed. The relationships between microstructural effects such as TRIP (Transformation-Induced Plasticity), TWIP (Twinning-Induced Plasticity) and the PLC effect were characterized. The effects of processing conditions including a deformation state (hot-rolled and cold-rolled) and strain parameters (deformation temperature, strain rate) were addressed. Factors affecting the value of critical strain for the activation of serrated flow behavior in particular in medium-manganese steels were described.The explanation of the Portevin-Le Chatelier mechanism in medium-Mn steels showing the TRIP effect is a complicated issue because of their microstructure consisting of several phases, as well as the TRIP effect exhibited by these steels. The exact characteristics of the factors affecting the PLC effect in AHSS is very important, both from a research point of view and their industrial implementation. This overview concerns the PLC phenomenon in Advanced High Strength Steels (AHSSs), with particular emphasis on advanced medium-Mn TRIP steels. The Nature of PLC Effect in SteelsThe plastic instability phenomenon occurring during the deformation of metallic materials shows two most common forms of propagative bands: Lüders and Portevin-Le Chatelier bands. The Lüders bands refer to the regions of localized strain. They form immediately after the onset of plastic deformation from the yield point drop, followed to a dominant stage of the stress plateau stage. Lüders bands are commonly caused by static strain aging (SSA) [13]. Static strain aging is characterized by an increase in strength properties associated with a decrease in plasticity. The PLC bands are represented by characteristic serrations on stress-strain curves. PLC bands are usually related to the dynamic strain aging (DSA) effect. The occurrence of the PLC bands is much more erratic, and can be observed in various forms (serration types) in comparison to the Lüders bands.There are several theories which explain the PLC effect in metallic materials. However, none has been so far clearly confirmed. The first interpretation of this phenomenon was proposed by Cottrell [1]. From his point of view, the PLC effect is related to the interactions between solute atoms, such as C or N, and mobile dislocations. The presence of serrations on a tensile curve is associated with the rapid release of dislocations from the atmospheres of dissolved atoms, which block their movement. This model is based on the assumption that atmospheres are formed around dislocations due to volume diffusion. In the presence of substitution atoms, diffusion is facilitated by vacancies resulting from plastic deformation. The interstitial gaps located in the vicinity of the dislocation are enl...

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Dynamic Strain Aging Behaviour in AISI 316L Austenitic Stainless Steel under As-Received and As-Welded Conditions

Cited by 14 publications

References 18 publications

Effect of Grain Size and Deformation Temperature on Mechanical Properties and Failure Behaviour of 316L Austenitic Stainless Steel

Effect of Grain Size and Deformation Temperature on Mechanical Properties and Failure Behaviour of 316L Austenitic Stainless Steel

Effect of Mo addition on microstructure, mechanical and machinability properties of Cr-PM steels

Explanation of the PLC Effect in Advanced High-Strength Medium-Mn Steels. A Review

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