A Short review on wrought austenitic stainless steels at high temperatures: processing, microstructure, properties and performance

Plaut, Ronald Lesley; Herrera, C.; Escriba, D.M.; Rios, Paulo Rangel; Padilha, Angelo Fernando

doi:10.1590/s1516-14392007000400021

Cited by 169 publications

(88 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In terms of microstructure, different intermetallic phases and carbides can be identified. Carbides of the kind M 23 C 6 and M 6 C are formed due to the high presence of carbon, and the most common intermetallic phases are: sigma phase (), Laves and Chi phase () [3], [4], many times studied from TTT diagrams. Several works in the literature aimed to investigate the presence of such phases and their effects [5], [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical, structural and tribological properties of superaustenitic stainless steel submitted at solution heat treatment

Borges¹,

Oliveira²,

Kublitski³

2015

Matéria (Rio J.)

View full text Add to dashboard Cite

RESUMOO aço inoxidável superasutenítico apresenta diversas aplicações tecnológicas, principalmente em ambientes corrosivos. A precipitação de diferentes fases pode alterar algumas de suas propriedades mecânicas. Tais alterações afetam vários fatores, incluindo a vida útil do material diante de condições de trabalho adversas. Neste estudo, medidas de Indentação Instrumentada, Tribologia e Difração de Raios X (DRX) foram utilizadas para avaliar possíveis alterações em regiões próximas à superfície em amostras tratadas termicamente. Os parâmetros analisados foram: dureza e módulo de elasticidade, coeficiente de atrito e alterações estruturais na célula unitária nas fases identificadas. Os resultados foram comparados com aço austenítico comum da famí-lia AISI 304. A presença das fases  (grupo espacial P42mnm) e austenita- (grupo espacial Fm3m) foram detectadas. Os dados analisados indicaram que a presença da fase intermetálica  contribuiu para pequenas alterações na dureza em regiões próximas à superfície e no coeficiente de atrito. Para regiões mais profundas (bulk) as propriedades analisadas foram semelhantes aos aços inoxidáveis comerciais.Palavras-chave: aço austenítico, aço superaustenitico, refinamento Rietveld. ABSTRACTThe superaustenitic stainless steel presents several technological applications, mainly in corrosive environments. The different phase precipitation might alter some of its mechanical properties. Such alterations affect several factors, including the working life of the material under adverse working conditions. In this study, Instrumented Indentation techniques, Tribology and X-ray diffraction (XRD) were used to evaluate alterations in regions close to the surface. The parameters analyzed were: hardness and elastic modulus (instrumented indentation), friction coefficient (tribology) and structural alterations of the unit cell of the identified phases (XRD -Rietveld Refinement). All properties analyzed were compared with those of common austenitic steel. The presence of -phase (space group P42mnm) and -austenite (space group Fm3m) were detected. Data analyzed indicated that the presence of -phase caused small alteration in properties such as hardness in regions close to the surface. In the regions farther from the surface (material bulk) data can be compared to that of conventional austenitic steel.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanical, structural and tribological properties of superaustenitic stainless steel submitted at solution heat treatment

Borges¹,

Oliveira²,

Kublitski³

2015

Matéria (Rio J.)

View full text Add to dashboard Cite

show abstract

“…SS304 merupakan baja tahan karat austenit dengan spesifikasi dasar umumnya mengandung paling sedikit 16% krom (Cr) dan 6% nikel (Ni) [3]. Dalam usaha untuk meningkatkan karakteristik baja tahan karat untuk dapat digunakan bahan struktur dan ditempatkan pada lingkungan tertentu diperlukan beberapa keunggulan terhadap mekanik sehingga perlu ditambahkan unsurunsur pemadu seperti Mo, Ti, Cu.…”

Section: Pendahuluanunclassified

“…Mode ini dapat diprediksi dengan baik menggunakan rasio ekivalen antara Cr dan Ni [3]. Pada umumnya selama mengalami proses solidifikasi baja tahan karat austenit mengandung fasa δ ferit [3].…”

Section: Pendahuluanunclassified

See 1 more Smart Citation

Karakteristik Daktilitas SS304 Yang Teroksidasi Pada Temperatur Tinggi

Setiawan

Sungkono

2017

urania

View full text Add to dashboard Cite

ABSTRAK KARAKTERISTIK DAKTILITAS SS304 YANG TEROKSIDASI PADA TEMPERATUR TINGGI.Perubahan karakteristik kekerasan, kekuatan tarik dan daktilitas SS304 yang dikenai perlakuan panas pada temperatur tinggi dengan media udara telah dilakukan. Baja SS304 merupakan baja tahan karat yang memiliki berbagai keunggulan sehingga banyak digunakan di dunia industri. Pada penelitian ini digunakan sampel uji dari pipa SS304 dengan diameter 30 mm dipotong secara transversal sehingga berbentuk cincin dengan lebar 3 mm. Sampel dikenai proses oksidasi dengan pemanasan pada temperatur 600 °C, 800 °C dan 1000 °C selama 1 dan 2 jam di dalam media udara. Setelah proses oksidasi sampel dikenai pendinginan baik secara alamiah diluar tungku atau dipercepat menggunakan media air, kemudian dilakukan pengujian kekerasan dan kekuatan tarik kearah transversal. Hasil pengujian menunjukkan bahwa terjadi peningkatan kekerasan pada sampel SS304 yang dikenai pendinginan dipercepat dibandingkan dengan sampel SS304 yang dikenai pendinginan alamiah. Nilai kekerasan tertinggi diperoleh pada pemanasan 1000 °C selama 1 jam dengan pendinginan dipercepat. Perubahan nilai kekerasan sebelum dan setelah melalui proses perlakuan terjadi dari 281,25 HV menjadi 468 HV. Nilai kekuatan tarik sampel SS304 memiliki kecenderungan menurun, namun daktilitasnya mengalami peningkatan. Hasil uji menunjukkan adanya penigkatan kekuatan tarik dan daktilitas SS304 yang diberi perlakuan pemanasan pada temperatur 600 °C selama 2 jam dan dikenai pendinginan alamiah. Kekuatan tariknya menjadi 744,04 MPa dan elongasinya meningkat sebesar 12,38 %. Dari hasil pengujian diperoleh suatu pedoman bahwa penggunaan SS304 dalam lingkungan oksidasi pada temperatur tinggi dibatasi maksimum di temperatur 600 °C.Kata kunci: daktilitas, SS304, oksidasi, temperatur tinggi.

show abstract

“…Austenitic stainless steels (ASS) are the most commonly alloys in industries where aggressive environments prevail 1) . The AISI 347 is an ASS constituted by a matrix of austenite with the presence of ferrite in small percentages and it is stabilized with Nb.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Electrolyte Composition in the Degree of Sensitization in AISI 347H Stainless Steel

et al. 2017

View full text Add to dashboard Cite

This study evaluated the suitability of the depassivator in revealing low degrees of sensitization (DOS) in samples of wrought AISI 347H austenitic stainless steel in the as-received condition and solution heat treated (SHT) at 1050 C. Assessment of the electrolyte composition was performed by the double loop electrochemical potentiokinetic reactivation (DL-EPR) test at room temperature. The electrolyte 1.0M H 2 SO 4 + 0.50M HCl was found to be adequate for detecting low DOS. Microstructural characterization of the as-received material revealed the presence of Cr-rich carbides. These carbides were responsible of the susceptibility to IGC.

show abstract

A Short review on wrought austenitic stainless steels at high temperatures: processing, microstructure, properties and performance

Cited by 169 publications

References 36 publications

Mechanical, structural and tribological properties of superaustenitic stainless steel submitted at solution heat treatment

Mechanical, structural and tribological properties of superaustenitic stainless steel submitted at solution heat treatment

Karakteristik Daktilitas SS304 Yang Teroksidasi Pada Temperatur Tinggi

Assessment of the Electrolyte Composition in the Degree of Sensitization in AISI 347H Stainless Steel

Contact Info

Product

Resources

About