On Some Relationships between Thermal History,Microstructure and Phase Transformations in Continuously Heated IF Steels.
Microstructure is generally considered as a key element in comprehension of the mechanical behavior of materials. It is usually related to the thermal history of the material and it is also an important feature of phase transformations. In this study we analyze the evolution of morphologies that are induced in IF steels during rapid, continuous heating. The heat cycles consisted of heating with a rate up to 1500℃/s followed by water/air cooling. The employed heating method, as well as the geometrical form of the samples, enabled to obtain the temperature gradients up to 2000℃ cm-1. Temperature measurements and recordings with the aid of ultra-rapid infrared pyrometry made it possible to determine the characteristic temperatures of austenite formation and decomposition. The evolution of morphology, initially composed of coarse or fine grained ferrite is correlated to the key parameters of the grain growth. The formation of columnar grains during continuous heating is discussed in terms of the selective growth phenomenon.
columnar grain growth IF steels HAZ phase transformations
KALUBA Wlodzimierz KALUBA Thérèse
Laboratoire de Thermophysique de la Matiérè Condensée LTPMC,UMR CNRS 8024,Université du Littoral -Còte dOpale-,Longuenesse,France
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
181-187
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）