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Influence of Texture on the Mechanical Properties of Hot Rolled Duplex Stainless Steels

机译:织构对热轧双相不锈钢力学性能的影响

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摘要

This paper reports an investigation of bulk and micro texture in the as cast condition and in hot rolled conditions (50 and 75% thickness reduction) of nitrogen alloyed duplex stainless steel. Bulk texture measurements were carried out using orientation-imaging microscopy (OIM). The micro texture measurements were carried out using electron backscattered diffraction (EBSD) system for the dual phases; ferrite (alpha) and austenite (gamma). The amount of alpha fiber formation for each reduction is reported under the conditions of before heat treatment (BHT) and after heat treatment (AHT). Individual texture components for both 50 and 75% reduction under the condition of BHT and AHT are also reported. The results reveal that there is a definite improvement in the mechanical properties after reducing the specimen thickness to 75% by hot rolling, followed by heat treatment (solutionizing). This improvement in the mechanical property is correlated with the volume of low angle grain boundaries (EBSD analysis) and with the cleavage facets (SEM analysis).
机译:本文报道了对氮合金双相不锈钢的铸态和热轧状态(厚度减少50%和75%)的整体和微观组织的研究。使用取向成像显微镜(OIM)进行大块纹理测量。使用电子背散射衍射(EBSD)系统对双相进行微织构测量。铁素体(α)和奥氏体(γ)。在热处理之前(BHT)和热处理之后(AHT)的条件下报告了每次还原的α纤维形成量。还报告了在BHT和AHT条件下减少50%和75%的单个纹理成分。结果表明,通过热轧将样品厚度减小到75%,然后进行热处理(固溶),可以显着改善机械性能。机械性能的改善与低角度晶界的体积(EBSD分析)和解理面(SEM分析)相关。

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