| DIFFUSION OF HYDROGEN IN(α+γ)DUPLEX STAINLESS STEEL |
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| 作者姓名： | HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University Beijing China Professor Division of Metallic Meterials |
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| 作者单位： | HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University，Beijing，China Professor，Division of Metallic Meterials，Department of Materials Science and Engineering，Tsinghua University，Beijing，China |
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| 摘 要： | The permeation curves of hydrogen in ferritic-austenitic duplex stainless steel have beenelectrochemically determined.The apparent diffusivity of hydrogen depends on the austenitecontent(f_γ)at room temperature,D=(0.27+0.9/f_γ~2)(10~(-10)cm~2/s).It is simply verified thathydrogen in ferritic-austenitic duplex stainless steel diffuses in “series-connection” formthrough both ferrite grain and austenite grain.The apparent diffusivity isD=D_αD_γ/(f_α~2D_γ+f_γ~2D_α),where D_α,D_γ are diffusivity of hydrogen in ferrite grain andaustenite grain respectively,f_α,f_γ are volume fraction,in turn,of ferrite grain and austenitegrain.
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| 收稿时间： | 1989-08-25 |
| 修稿时间： | 1989-08-25 |
DIFFUSION OF HYDROGEN IN(α+γ)DUPLEX STAINLESS STEEL |
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| HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University,Beijing,China Professor,Division of Metallic Meterials,.DIFFUSION OF HYDROGEN IN(α+γ)DUPLEX STAINLESS STEEL[J].Acta Metallurgica Sinica(English Letters),1989,2(4):274-278. |
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| Authors: | HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University Beijing China Professor Division of Metallic Meterials |
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| Affiliation: | HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University,Beijing,China Professor,Division of Metallic Meterials,Department of Materials Science and Engineering,Tsinghua University,Beijing,China |
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| Abstract: | The permeation curves of hydrogen in ferritic-austenitic duplex stainless steel have been electrochemically determined.The apparent diffusivity of hydrogen depends on the austenite content(f_γ)at room temperature,D=(0.27+0.9/f_γ~2)(10~(-10)cm~2/s).It is simply verified that hydrogen in ferritic-austenitic duplex stainless steel diffuses in “series-connection” form through both ferrite grain and austenite grain.The apparent diffusivity is D=D_αD_γ/(f_α~2D_γ+f_γ~2D_α),where D_α,D_γ are diffusivity of hydrogen in ferrite grain and austenite grain respectively,f_α,f_γ are volume fraction,in turn,of ferrite grain and austenite grain. |
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| Keywords: | hydrogen diffusion duplex stainless steel |
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