Origin of low temperature toughness in a 12Cr-10Ni martensitic precipitation hardenable stainless steel

Anoop, C. R.; Prakash, Aditya; Murty, S. V. S. Narayana; Samajdar, I.

doi:10.1016/j.msea.2017.10.032

Cited by 17 publications

(5 citation statements)

References 14 publications

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“…However, the total variation is within 15 VHN, indicative of feeble response of the strength of the steel to solution treatment temperature. In a separate study by the authors on effect of aging on mechanical properties of the present steel under study [20], it was observed that aging temperature has a strong effect on tensile properties and impact toughness, and 250 °C was found as the optimum aging temperature to achieve good combination of tensile properties and cryogenic impact toughness. This is attributed to the strong influence of precipitate size and its coherency with the matrix on impact toughness.…”

Section: Resultsmentioning

confidence: 69%

“…This type of iron-nickel martensite is soft and ductile with high dislocation density, which accommodates strains during transformation. Dilatometry study carried out on this steel had indicated the austenite start (A s ) and austenite finish (A f ) temperatures of the steel to be 630 and 660 °C, respectively [20].…”

Section: Resultsmentioning

confidence: 99%

“…This is attributed to the strong influence of precipitate size and its coherency with the matrix on impact toughness. Table 1 lists the tensile properties and impact toughness of the steel under study [20] in comparison with AISI 304, an austenitic stainless steel and A 286, an austenitic precipitation hardenable stainless steel [15,24]. The major factors that contribute to the low temperature toughness of PH stainless steels are the austenite content, nature of precipitates, and misorientation among packets which facilitate deviation of advancing cracks and make its path tortuous [21].…”

Section: Resultsmentioning

confidence: 99%

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Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Anoop

Prakash

Murty

et al. 2018

Metallogr. Microstruct. Anal.

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Precipitation hardenable stainless steels have become a material of choice for many advanced engineering applications that require high strength and excellent corrosion resistance. Solution treatment temperature is an important parameter that influences the prior austenite grainsize and retained austenite content in this type of steels. Solution treatment has been carried out in a 12Cr-10Ni steel at treatment temperatures ranging from 750 to 1000 °C at 50 °C intervals. Aging was carried out on two sets of solution-treated samples at 250 and 500 °C. Charpy impact tests at room temperature and 77 K were carried out on solution-treated as well as aged samples. Measurement of retained austenite, prior austenite grainsize, and EBSD analysis were carried out to explain the observed phenomena. Solution treatment temperature is observed to have only feeble effect on impact toughness and hardness; however, it considerably affects the content of retained austenite. The aging temperature and thereby the precipitate size were observed to be the major factors that influence cryogenic impact toughness for 12Cr-10Ni steel.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Anoop

Prakash

Murty

et al. 2018

Metallogr. Microstruct. Anal.

Self Cite

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“…Precipitation hardening (PH) stainless steels (SSs) generally have higher strength and similar corrosion resistance than austenitic SSs, and they have an obvious advantage in ductility over high carbon martensitic SSs [1][2][3]. In recent decades, the microstructural evolution of PH-SSs has been intensively studied with the addition of copper, molybdenum, aluminium and titanium either singly or in combination, aiming at achieving a uniform distribution and refinement of precipitation [4,5].…”

Section: Introductionmentioning

confidence: 99%

Ageing Hardening Mechanism and Corrosion Resistance in the Fe65Cr13Cu3(CoMnMoNiAlTi)19 Medium-Entropy Stainless Alloy

Zhang

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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The ageing hardening mechanism of a newly designed Fe-Cr-based Fe 65 Cr 13 Cu 3 (CoMnMoNiAlTi) 19 medium-entropy stainless alloy (ME-SA) with a simple bcc solid solution matrix was studied. This kind of ME-SA possessed a higher ageing hardness of approximately 584 HV and higher compressive stress and corrosion resistance than those of the conventional precipitation hardening stainless steel 17-4PH (Cr 17 Ni 4 Cu 4 Nb), which has comparable compressive strain. The well-dispersed B2-ordered phase in the cast state transformed to a D0 3 crystal structure with a higher ordering degree and reduced the precipitate size after ageing at 500 °C, thus promoting a great ageing hardening effect.

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“…The steel has the advantages of high thermal conductivity, low expansion coefficient. 16,17 The oxygen immersed in LBE alloy will react with the iron atom of martensitic stainless steel to form a magnetite layer (Fe 3 O 4 ) over the surface of the steel. For the cases of low oxygen concentration, the layer of Fe 3 O 4 cannot be formed.…”

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confidence: 99%

The effect of impurities Pb, Bi, and PbO on erosion properties of Lead‐Bismuth Eutectic alloy on Fe₃O₄ oxide film by first principle calculations

Zhang

Cai

Yang

2022

Surface & Interface Analysis

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The first-principle calculation was performed to study the effect of impurities Pb, Bi, and PbO on erosion properties of liquid lead-bismuth eutectic alloy on the metal oxide (Fe 3 O 4 ) and its surfaces. We found that whether in the bulk or on the surface of Fe 3 O 4 the formation energy by substitution of Fe with Bi is slightly larger than that with Pb substitution and the formation energy by substitution of Fe with PbO is much larger than those with Pb and Bi, indicating that PbO has weaker corrosion potential than Pb/Bi. The calculation results show that a tetrahedral site in Fe 3 O 4 should be the weakest position where Fe 3 O 4 is attacked by these exotic impurities.The corrosion process on the oxide film will be initialized at that position. It can be seen that for the doping case the dissociation energy of Fe atom in the (110) surface has the smallest value, a medium value in (100) surface, and the largest value in (111) surface. Correspondingly, the corrosion resistance of doping Fe 3 O 4 film in (110) surface is the weakest one among these surfaces. For the doping-free case, the (100) surface has the weakest corrosion resistance. By comparing the doping case with no-doping case it can be seen that the impurities of Pb, Bi, and PbO will weaken the corrosion resistance of Fe 3 O 4 film further. The doping has a negative impact on the stability of the structure and on the corrosion resistance of Fe 3 O 4 film. From present results, it is also seen that the replacement of Fe in Fe 3 O 4 by multiple impurities is more likely to occur than the replacement of only single impurity.

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Origin of low temperature toughness in a 12Cr-10Ni martensitic precipitation hardenable stainless steel

Cited by 17 publications

References 14 publications

Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Ageing Hardening Mechanism and Corrosion Resistance in the Fe65Cr13Cu3(CoMnMoNiAlTi)19 Medium-Entropy Stainless Alloy

The effect of impurities Pb, Bi, and PbO on erosion properties of Lead‐Bismuth Eutectic alloy on Fe₃O₄ oxide film by first principle calculations

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Origin of low temperature toughness in a 12Cr-10Ni martensitic precipitation hardenable stainless steel

Cited by 17 publications

References 14 publications

Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Effect of Solution Treatment Temperature on Impact Toughness (Room Temperature and 77 K) of a 12Cr–10Ni Martensitic Precipitation Hardenable Stainless Steel

Ageing Hardening Mechanism and Corrosion Resistance in the Fe65Cr13Cu3(CoMnMoNiAlTi)19 Medium-Entropy Stainless Alloy

The effect of impurities Pb, Bi, and PbO on erosion properties of Lead‐Bismuth Eutectic alloy on Fe3O4 oxide film by first principle calculations

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The effect of impurities Pb, Bi, and PbO on erosion properties of Lead‐Bismuth Eutectic alloy on Fe₃O₄ oxide film by first principle calculations