Structural Characterization and Its Physical Properties of Non-standard A1 Austenite Steel

Effendi, Nurdin; Jahja, Azis K.

doi:10.14355/ijmme.2014.0302.03

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The material belongs to the austenitic steel family; it is expected to have special characteristics, such as the ability to be a structural material for high temperature operations (Effendi, 2010;Effendi et al, 2012;Effendi & Jahja, 2014).…”

Section: A New Precipitation-hardened Austenitic Stainless Steel Invementioning

confidence: 99%

A New Precipitation Hardened Austenitic Stainless Steel Investigated by Electron Microscopy

Dani¹,

Dimiyati²,

Iskandar³

et al. 2018

IJTech

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The 56Fe16.6Cr25Ni0.9Si0.5Mn austenitic superalloy has been produced in an induction furnace; it was made from granular ferro-scrap, ferrochrome, ferrosilicon, and ferromanganese materials. Originally, this alloy had been proposed for use in high mechanical loads and high temperature conditions (such as in nuclear and fossil fuel power plant facilities). Tensile strength tests showed that the alloy has an average yield strength of about 430.56 MPa, which is higher than Incoloy A-286 (a commercially available alloy). A combination of microscopy techniques by means of an optical microscope, X-ray diffraction [XRD], scanning electron microscopy [SEM], and transmission electron microscopy [TEM] techniques were applied in order to get detailed information about the fine structure of the alloy. XRD confirmed that the alloy matrix exhibits an FCC crystal structure with a lattice parameter of about 3.60 Å and grain sizes ranging from 50 to 100 µm. The results of the TEM analysis revealed the new type of precipitations that formed at the grain boundaries. These needle-like precipitations, probably Fe/Cr-rich precipitations of the (Fe,Cr)xCy type, acted as the source of intergranular corrosion (IGC). Small coherent plate-like and much smaller granular precipitations were found distributed homogenously along grain boundaries and inside the grains. Combining the tensile strength test and microstructure analysis suggested that these precipitations play significant roles in the hardness of the investigated sample.

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Section: A New Precipitation-hardened Austenitic Stainless Steel Invementioning

confidence: 99%

A New Precipitation Hardened Austenitic Stainless Steel Investigated by Electron Microscopy

Dani¹,

Dimiyati²,

Iskandar³

et al. 2018

IJTech

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“…Meanwhile, to support the master plan, the research group for nuclear reactor material at BATAN has successfully synthesized the 57Fe17Cr25NiSi super alloy using local materials. Such material has great potential for use in a variety of high-temperature applications (Effendi et al, 2012;Effendi & Jahja, 2014). In this study, a new 57Fe17Cr25NiSi non-standard super alloy is produced using a new Arc Plasma Sintering (APS) method (Bandriyana et al, 2017) conducted at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Deformation of 57Fe17Cr25NiSi Austenitic Super Alloy after Arc Plasma Sintering

Dani¹,

Dimyati²,

Parikin³

et al. 2019

IJTech

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The microstructure and deformation of 57Fe17Cr25NiSi super alloy are investigated in this study. The super alloy was produced from a mixture of granular ferro-scrap, ferro chrome, ferro silicon and ferro manganese raw materials by the casting method and then sintered using arc plasma for 4 and 8 minutes. The super alloy has been proposed in nuclear as well as fossil power plant facilities, such as vessels and heat exchangers. A combination of microscopy investigations by means of X-ray diffraction and high-resolution powder diffraction, optical microscopy, scanning electron microscopy and transmission electron microscopy techniques was conducted in order to obtain detailed information about the deformation of super alloy steel and its microstructures, especially fine structures. It was found that the austenitic super alloy microstructure is composed of dendrites of -austenite, which are separated by a eutectic structure of Fe-Cr-C alloy. Arc plasma sintering for 4 to 8 minutes leads to a decrease in the area of the eutectic structure at the inter-dendrites and forms micro strain, from 4.60×10-3 to 5.39-4.06×10-4 .

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Structural Characterization and Its Physical Properties of Non-standard A1 Austenite Steel

Cited by 2 publications

References 2 publications

A New Precipitation Hardened Austenitic Stainless Steel Investigated by Electron Microscopy

A New Precipitation Hardened Austenitic Stainless Steel Investigated by Electron Microscopy

Microstructure and Deformation of 57Fe17Cr25NiSi Austenitic Super Alloy after Arc Plasma Sintering

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