σ phase dissolution in duplex stainless steel at elevated temperature studied by thermal analysis
σ phase dissolution in duplex stainless steel at elevated temperature studied by thermal analysis
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DOI：
10.1016/j.matlet.2008.05.040
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发表时间：
2008-09
影响因子：
3
通讯作者：
K. W. Wong;C. Shek;Wenjun Zhang;J. Lai
中科院分区：
文献类型：
--
作者：
K. W. Wong;C. Shek;Wenjun Zhang;J. Lai
用差热分析和扫描电子显微镜研究了高温下双相不锈钢中σ相向铁素体的再溶解过程。DSS样品在不同的温度下老化不同的时间。工艺条件的选择使得铁素体全部转变为σ相。随后的差热分析表明，Sigma溶解的起始温度T_s和峰值温度T_p强烈依赖于σ相的初始分布和形貌。差热分析特征温度和先前老化温度之间的这种相关性可用于在涉及恶劣环境的应用中的温度指示目的。
The redissolution of σ phase to ferrite in duplex stainless steel (DSS) in high temperature range was studied by differential thermal analysis (DTA) and scanning electron microscopy. DSS samples were aged at different temperatures for various durations. The conditions were chosen such that all the ferrite transformed to σ phase. Subsequent DTA measurements revealed that the onset temperature Tsand the peak temperature Tpfor sigma dissolution strongly depend on the initial distribution and the morphology of σ phase. This correlation between the DTA characteristic temperatures and prior ageing temperatures may be used for temperature indication purposes in applications involving hostile environments.