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首页> 外文会议>Proceedings of the 3rd Pan American materials congress >High Temperature In-Situ X-Ray Analysis of a Lean Duplex Stainless Steel
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High Temperature In-Situ X-Ray Analysis of a Lean Duplex Stainless Steel

机译：贫双相不锈钢的高温原位X射线分析

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摘要

Duplex Steels have been used for different applications in the oil and gas industry due to their high strength and corrosion resistance. In this work, a Lean Duplex Steel (UNS S32304) has been investigated by High Temperature In-Situ X-Ray Diffraction, in order to address phases transformations occurring during high-temperature real time exposure and the formation of deleterious phases such as sigma phase. Samples were subjected to a temperature of 800 ℃ for different time intervals (30 and 60 min) inside a high temperature furnace attached to an x-ray diffractometer. Formation of sigma phase was observed, both in the ferrite grain boundaries and in the ferrite/austenite interface. The volume of sigma phase was measured by quantitative phase analysis using the Rietveld method and results varied from 2.80 to 15.92% in volume.
机译：双相钢具有高强度和耐腐蚀性，已在石油和天然气行业中用于不同的应用。在这项工作中，通过高温原位X射线衍射研究了贫双相钢（UNS S32304），以解决在高温实时暴露过程中发生的相变以及诸如σ相的有害相的形成。 。在连接到X射线衍射仪的高温炉内，将样品在800℃下进行不同时间间隔（30和60分钟）的加热。在铁素体晶界和铁素体/奥氏体界面中均观察到σ相的形成。使用Rietveld方法通过定量相分析测量sigma相的体积，结果从2.80％到15.92％的体积不等。

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