Quantification of ferrite-martensite interface in dual phase steels: A first-principles study

Ramazani, Ali; Kazemiabnavi, Saeed; Larson, Ronald G.

doi:10.1016/j.actamat.2016.06.047

Cited by 22 publications

(8 citation statements)

References 48 publications

(35 reference statements)

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“…Quantum ESPRESSO package 45 was used for DFT calculations because this package was used by several researchers to calculate a variety of semiconductors, ferrites, graphene, and graphene-based composites. [46][47][48][49][50][51][52] The catalytic performance of the as-synthesized nanocomposites was tested for (i) reduction of 4-NP in presence of NaBH 4 , and (ii) epoxidation of styrene. Finally, the supercapacitance performance of CuFe 2 O 4 -RGO as electrode material was tested rst by constructing a three electrode system, and then a twoelectrode system.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

et al. 2018

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“…Seiring berjalannya waktu, teknologi modifikasi struktur mikro makin berkembang melalui berbagai rute proses untuk memenuhi kebutuhan sifat mekanik yang beraneka ragam. Salah satu proses yang saat ini banyak digunakan yaitu pemanasan fasa-ganda [2][3][4][5][6][7][8][9][10][11][12] .…”

Section: Pendahuluanunclassified

Pengaruh Kecepatan Pendinginan Baja Fasa Ganda Fe-Ni hasil Tempa Panas terhadap Struktur Mikro dan Nilai Kekerasan

Hasbi

Romijarso

Paristiawan

2020

JTBBT

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Kebutuhan material baja dengan berbagai kombinasi sifat mekanik menjadi isu yang sangat penting dalam perkembangan teknologi pada berbagai bidang. Kombinasi sifat mekanik tersebut dapat diwujudkan antara lain melalui mekanisme modifikasi fasa atau struktur mikro dalam suatu material. Berbagai teknik untuk memodifikasi fasa telah banyak dikembangkan, salah satu diantaranya melalui proses perlakuan panas. Penelitian ini membahas pengaruh variasi penggunaan media pendingin terhadap struktur mikro dan nilai kekerasan baja Fe-Ni. Sampel baja yang digunakan merupakan baja hasil proses tempa panas dengan pembebanan 100 ton pada suhu 1000°C. Sampel baja hasil tempa dipanaskan kembali pada suhu diantara Ac1 dan Ac3 yaitu 780 °C selama 1 jam. Kemudian masing-masing sampel dilanjutkan dengan proses pendinginan menggunakan beberapa media pendingin diantaranya udara, oli dan air. Berdasarkan analisis yang telah dilakukan, sampel baja as-cast dan baja pendinginan udara memiliki struktur mikro berupa ferit-perlit. Fasa ganda ferit-martensit terbentuk pada sampel dengan pendingin oli dan air dengan morfologi dan fraksi area yang berbeda. Bentuk fasa martensit yang dihasilkan media pendingin air cenderung berbentuk lath halus, sedangkan media pendingin oli menghasilkan fasa martensit berbentuk blok. Selanjutnya, fraksi area fasa ferit-martensit yang terbentuk juga dipengaruhi oleh kecepatan pendinginan. Fraksi area martensit memiliki kecenderungan meningkat seiring dengan peningkatan kecepatan pendinginan. Kondisi tersebut berpengaruh terhadap nilai kekerasan; sampel baja hasil pendinginan dengan media air memiliki nilai kekerasan tertinggi yaitu 520 HV.

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“…1,2 The development of DP steel through intercritical heat treatment (IHT) method is gaining a lot of popularity for imparting the desired qualities (such as lower distortion, wear resistance, corrosion resistance, and controlled grain growth) and properties (superior strength-ductility combinations and formability) to the alloy steels. [3][4][5] The DP steel shows the presence of ferrite-martensite phases along with some pearlite, bainite, and austenite phases. The DP steels are mainly characterized by their dispersed microstructures consisting of martensite phases, which imparts hardness and strength, and ferrite phase responsible for ductility and softness.…”

Section: Introductionmentioning

confidence: 99%

Processing and characterization of high strength dual-phase steel by two-step intercritical heat treatment process

Singh

Mewar

2018

Proceedings of the Institution of Mechanical Engineers, Part E:

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A simple approach of two-step intercritical heat treatment has been employed to study the effect of heat treatment on the evolution of microstructures and their effect on the mechanical properties of alloy steel (AISI 1012). The selected steel samples were directly placed in the preheated furnace and were progressively heat treated in two steps, intercritically between the Ac1–Ac3 temperature range. Immediate water quenching (preheated at 30 ℃) was carried out after heat treatment cycles. The processed steels were characterized by examining the X-ray diffraction patterns, microstructures, Vickers microhardness, and tensile strength. The normalized X-ray diffraction results of heat-treated steels revealed the substantial growth in the martenistic phases. The microstructures of heat-treated steel revealed the formation of needle-shape-like structures, which corresponds to the martenistic phase. The increased formation of martenistic phase due to the intercritical heat treatment process improved the overall microhardness (from 188 ± 9 HV of the parent steel to 412 ± 32 HV for 800 ℃ heat-treated steel) up to 2.2 times. The presence of soft and ductile (ferritic and pearlite) phases simultaneously with tough and strong (martenistic) phase allowed the improvement in the ultimate tensile strength. In comparison to parent steel with tensile strength of 510 ± 15 MPa, the intercritical heat treatment steel at 800 ℃ revealed 169.6% higher tensile strength of 1375 ± 35 MPa. However, percentage elongation was reduced by 60%, i.e. from 13 ± 1% for parent steel to 5.2 ± 2% of intercritical heat treatment steel (processed at 800 ℃). An overall study revealed that by a proper intercritical heat treatment process, dual-phase steels with better structure–properties correlation can be obtained for industrial applications.

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Quantification of ferrite-martensite interface in dual phase steels: A first-principles study

Cited by 22 publications

References 48 publications

Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

Pengaruh Kecepatan Pendinginan Baja Fasa Ganda Fe-Ni hasil Tempa Panas terhadap Struktur Mikro dan Nilai Kekerasan

Processing and characterization of high strength dual-phase steel by two-step intercritical heat treatment process

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Quantification of ferrite-martensite interface in dual phase steels: A first-principles study

Cited by 22 publications

References 48 publications

Synthesis of multifunctional CuFe2O4–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

Synthesis of multifunctional CuFe2O4–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

Pengaruh Kecepatan Pendinginan Baja Fasa Ganda Fe-Ni hasil Tempa Panas terhadap Struktur Mikro dan Nilai Kekerasan

Processing and characterization of high strength dual-phase steel by two-step intercritical heat treatment process

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Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures

Synthesis of multifunctional CuFe₂O₄–reduced graphene oxide nanocomposite: an efficient magnetically separable catalyst as well as high performance supercapacitor and first-principles calculations of its electronic structures