80 research outputs found
Evolution of Microstructure and Texture during Warm Rolling Of a Duplex Steel
The effect of warm rolling on the evolution of microstructure and texture in a duplex stainless steel (DSS) was investigated. For this purpose, a DSS steel was warm rolled up to 90 pct reduction in thickness at 498 K, 698 K, and 898 K (225 °C, 425 °C, and 625 °C). The microstructure with an alternate arrangement of deformed ferrite and austenite bands was observed after warm rolling; however, the microstructure after 90 pct warm rolling at 498 K and 898 K (225 °C and 625 °C) was more lamellar and uniform as compared to the rather fragmented and inhomogeneous structure observed after 90 pct warm rolling at 698 K (425 °C). The texture of ferrite in warm-rolled DSS was characterized by the presence of the RD (〈011〉//RD) and ND (〈111〉//ND) fibers. However, the texture of ferrite in DSS warm rolled at 698 K (425 °C) was distinctly different having much higher fraction of the RD-fiber components than that of the ND-fiber components. The texture and microstructural differences in ferrite in DSS warm rolled at different temperatures could be explained by the interaction of carbon atoms with dislocations. In contrast, the austenite in DSS warm rolled at different temperatures consistently showed pure metal- or copper-type deformation texture which was attributed to the increase in stacking fault energy at the warm-rolling temperatures. It was concluded that the evolution of microstructure and texture of the two constituent phases in DSS was greatly affected by the temperature of warm rolling, but not significantly by the presence of the other phas
The Ferrite Transformation in Hot Deformed 0.036% Nb Austenite at Temperatures Above the Ae3
P210 Discordance of prognostic risk between histopathology and gene signature in Japanese early breast cancer
Molybdenum alloying in high-performance flat-rolled steel grades
Considerable progress in developing flat-rolled
steel grades has been made by the Chinese steel industry
over the recent two decades. The increasing demand for
high-performance products to be used in infrastructural
projects as well as in production of consumer and capital
goods has been driving this development until today. The
installation of state-of-the-art steel making and rolling
facilities has provided the possibility of processing the
most advanced steel grades. The production of high-performance steel grades relies on specific alloying elements
of which molybdenum is one of the most powerful. China
is nearly self-sufficient in molybdenum supplies. This
paper highlights the potential and advantages of molybdenum alloying over the entire range of flat-rolled steel
products. Specific aspects of steel property improvement
with respect to particular applications are indicated
- …