The diffusion of chromium in a duplex alloy steel
The diffusion of chromium in a duplex alloy steel
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铬在双相合金钢中的扩散
DOI：
10.1179/030634576790431859
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
R. Hales
中科院分区：
文献类型：
--
作者：
A. Smith;R. Hales
采用标准连续切片技术研究了铬在含~ 8%铁素体的双相不锈钢中在873-1273 K温度范围内的扩散。所得到的浓度分布显示出多达四个不同的区域。两个主要区域是由于奥氏体和铁素体相的体积扩散，其他区域是由于短路路径。奥氏体相的体积扩散与316钢中Cr的扩散基本一致。Cr在近似组成为25cr - 5wt .-%Ni的铁氧体相中的扩散系数为：Dα =（6.0⁺¹¹₃）X 10⁻⁶（- 212±5/RT） m²s（活化能以kJ mol−1表示）Cr沿奥氏体/铁素体界面边界扩散增强的证据很少。
Diffusion of chromium in a duplex stainless steel containing ∼8% ferrite has been investigated in the temperature range 873–1273 K using the standard serial sectioning technique. The resulting concentration profiles exhibited up to four distinct regions. The two main regions are attributed to volume diffusion in the austenite and ferrite phases, the other zones being due to short-circuiting paths. Volume diffusion in the austenite phase is in good agreement with Cr diffusion in Type 316 steel. The Cr diffusion coefficient in the ferrite phase of approximate composition 25Cr-5 wt.-%Ni is given by: Dα = (6.0⁺¹¹₋₃) X 10⁻⁶ (- 212± 5/RT) m²s⁻¹ the activation energy being expressed in kJ mol−1. Little evidence was found for enhanced Cr diffusion along austenite/ferrite interface boundaries.