Study of microstructural evolution, microstructure-mechanical properties correlation and collaborative deformation-transformation behavior of quenching and partitioning (Q&amp;P) steel

Sun, Jing; Yu, Hao; Wang, Shaoyang; Fan, Yongquan

doi:10.1016/j.msea.2013.12.054

Cited by 68 publications

(26 citation statements)

References 23 publications

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“…Finally, the strain hardening behaviour is very similar for the 244-400-500 and the 244-400-1000 samples. The same RA morphology, average grain size and carbon content is found in both samples, so they present a weaker transformation stability compared to the 244-400-100 sample (Sun et al, 2014). This correlates well with the recent study (Xiong et al, 2013) where higher carbon, blocky RA in a Q&P steel transformed to martensite at the onset of deformation, whereas lower carbon film-like RA remained stable up to 12.5 % strain.…”

Section: Influence Of Ptsupporting

confidence: 88%

Effect of Q&P parameters on microstructure development and mechanical behaviour of Q&P steels

Diego-Calderón¹,

Knijf²,

Molina-Aldareguia³

et al. 2015

REVMETAL

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Steel with a nominal composition of 0.25C-1.5Si-3Mn-0.023Al (mass %) was subjected to Quenching and Partitioning (Q&P) with varying parameters (quenching temperature, partitioning temperature and partitioning time) resulting in formation of multi-phase microstructure, which was thoroughly studied using X-ray (XRD) and Electron Backscatter Diffraction (EBSD). Mechanical properties of the Q&P steel were measured by tensile tests. Plastic deformation of Q&P steel at micro-scale was investigated by in situ tensile testing and digital image correlation analysis. The effect of Q&P parameters on the microstructure (phase composition, size and volume fraction of micro constituents, texture and carbon content in retained austenite) is discussed. After analyzing the mechanical properties, plastic deformation at the micro-scale and the microstructure, it is shown that the strain partitioning between phases strongly depends on the microstructure of the Q&P steel, which, in turn, can be tuned via manipulation with Q&P parameters. RESUMEN: Efecto de los parámetros de procesado en el desarrollo microestructural y en las propiedades mecánicas en aceros Q&P.Con el objetivo de evaluar el efecto de los parámetros de procesado en un acero con una composición nominal de 0,25C-1,5Si-3Mn-0,023Al (% masa), éste ha sido sometido a un tratamiento térmico denominado "Quenching and Partitioning" (Q&P), en el que se han variado la temperatura de "quenching", la temperatura de "partitioning" y el tiempo de "partitioning". Como resultado se ha obtenido una microestructura multifásica, la cual ha sido analizada en detalle utilizando difracción de rayos-X (XRD) y de electrones retrodispersados (EBSD). Asimismo, se han medido las propiedades mecánicas de los aceros Q&P mediante ensayos de tracción. La deformación plástica de los aceros Q&P a nivel micrométrico ha sido estudiada mediante ensayos "in situ" en el microscopio electrónico de barrido y la posterior aplicación de la técnica de correlación digital de imágenes. Se ha determinado el efecto de los parámetros de procesado en la microestructura (composición de fases, tamaño y fracción en volumen de los distintos micro constituyentes, textura y contenido en carbono en la austenita retenida). Una vez se han relacionado las propiedades mecánicas, la deformación plástica a nivel micrométrico y la microestructura, se concluye que la partición de la deformación entre fases depende en gran medida de la propia microestructura del acero Q&P, que a su vez puede ser ajustada a través de la manipulación de los parámetros de procesado.

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Section: Influence Of Ptsupporting

confidence: 88%

Effect of Q&P parameters on microstructure development and mechanical behaviour of Q&P steels

Diego-Calderón¹,

Knijf²,

Molina-Aldareguia³

et al. 2015

REVMETAL

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show abstract

“…10 shows local misorientation distribution maps of the investigated steel at various tempering temperatures. The local misorientation distribution maps are used to evaluate small local strain gradients in the material [22][23][24]. This is a very efficient way to localize the areas of stress concentration by a misorientation range between 01 and 51.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Study of microstructural evolution and strength–toughness mechanism of heavy-wall induction bend pipe

Zhou

et al. 2014

Materials Science and Engineering: A

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“…Manganese is used to enhance the stability of austenite and silicon to suppress the precipitation of carbides [4,5]. The thickness of cold-rolled steel sheet is 2 mm.…”

Section: Methodsmentioning

confidence: 99%

“…Intercritical heating, quenching and partitioning (I&Q&P) is one of the most promising and innovative heat treatments of the third generation AHSS due to an improved combination of strength and ductility [2,3]. I&Q&P process starts with partial austenization followed by rapid cooling to the temperature between Ms and Mf to obtain a controlled amount of martensite [4]. Then the steel is subjected to isothermal treatment at a higher temperature so that carbon can partition from supersaturated martensite to retained austenite.…”

Section: Introductionmentioning

confidence: 99%

Study of microstructural evolution, microstructure-mechanical properties correlation and collaborative deformation-transformation behavior of quenching and partitioning (Q&P) steel

Cited by 68 publications

References 23 publications

Effect of Q&P parameters on microstructure development and mechanical behaviour of Q&P steels

Effect of Q&P parameters on microstructure development and mechanical behaviour of Q&P steels

Study of microstructural evolution and strength–toughness mechanism of heavy-wall induction bend pipe

The stability of retained austenite at different locations during straining of I&Q&P steel

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