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Critical Assessment of Techniques for the Description of the Phase Composition of Advanced High-Strength Steels

机译:关键技术评估先进的高强度钢的相组成描述

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摘要

The phase composition and portion of individual phases in advanced high-strength steels (AHSS) CP1000 and DP1000 was studied by complementary microscopic and diffraction techniques. CP1000 and DP1000 steel grades have a high strength-to-density ratio and they are used in many applications in the automotive industry. The microstructure of the CP1000 “complex phase” steel consists of ferrite, bainite, martensite and a small amount of retained austenite. DP1000 is a dual phase steel, which has a structure of a ferritic matrix with islands of martensite and a minor amount of retained austenite. The influence of selected etchants (Nital, LePera, Beraha I, Nital followed by metabisulfite, Nital followed by LePera, and Nital followed by Beraha I) on the microstructure image is described. X-ray diffraction, neutron diffraction and light optical, scanning and transmission electron microscopy were used in this work for advanced characterization of the microstructure and phase composition. The information provided by each technique is critically compared.
机译:通过互补的显微和衍射技术研究了高级高强度钢(AHSS)CP1000和DP1000中的相组成和各相的组成。 CP1000和DP1000钢牌号具有很高的强度密度比,并且被用于汽车工业的许多应用中。 CP1000“复相”钢的显微组织由铁素体,贝氏体,马氏体和少量残余奥氏体组成。 DP1000是一种双相钢,具有铁素体基体结构,具有马氏体岛和少量残留奥氏体。描述了所选蚀刻剂(Nital,LePera,Beraha I,Nital然后是偏亚硫酸氢盐,Nital然后是LePera,Nital接下来是Beraha I)对显微图像的影响。在这项工作中使用了X射线衍射,中子衍射以及光学,扫描和透射电子显微镜对显微组织和相组成进行了高级表征。严格比较每种技术提供的信息。

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