Low-energy Ar ion-induced anomalous carbon diffusion in pre-decarburized 45 steel

ZHANG Li TANG Guangze MA Xinxin

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Low-energy Ar ion-induced anomalous carbon diffusion in pre-decarburized 45 steel

更新时间：2021-03-12

- Low-energy Ar ion-induced anomalous carbon diffusion in pre-decarburized 45 steel
- NUCLEAR TECHNIQUES Vol. 32, Issue 3, (2009)
- 作者机构：
  
  哈尔滨工业大学材料学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助(50571032)
- DOI：
  CLC： TG142.15
- Published：01 March 2009
- 稿件说明：
移动端阅览
[1]张力,唐光泽,马欣新.1keV Ar离子辐照对预脱碳45#钢中碳扩散行为的影响[J].核技术,2009,32(03):190-194.

ZHANG Li TANG Guangze MA Xinxin. Low-energy Ar ion-induced anomalous carbon diffusion in pre-decarburized 45 steel[J]. Nuclear techniques, 2009, 32(3): 190-194.
[1]张力,唐光泽,马欣新.1keV Ar离子辐照对预脱碳45#钢中碳扩散行为的影响[J].核技术,2009,32(03):190-194. DOI：

ZHANG Li TANG Guangze MA Xinxin. Low-energy Ar ion-induced anomalous carbon diffusion in pre-decarburized 45 steel[J]. Nuclear techniques, 2009, 32(3): 190-194. DOI：

摘要

将45#钢在850oC的H2+H2O中保温2h

预制厚度为200μm的柱状晶脱碳层。在1keV0.4mA/cm2的Ar+辐照条件下

研究了850°C碳的扩散行为。横截面金相组织显示

在双相区温度下保温扩散

碳优先沿晶界向表面迁移

并导致铁素体和奥氏体相界面的移动。对比存在离子辐照时和单纯热扩散时碳的扩散动力学

发现存在离子辐照时

碳向表面迁移的速率降低。这种长程影响扩散的效应无法用现有理论解释

应与非线性效应有关。

Abstract

Carbon diffusion behavior at 850℃ in 45# steel under 1 keV high-flux Ar+ ion irradiation was investigated. The steel samples had been pre-decarburized at 850℃ in H2 +H2O for 2 h to form a columnar ferrite surface layer of 200 μm. Cross-section structure of the samples indicates that

at the dual phase zone

carbon diffuses to the surface

especially in grain boundaries

leading to the movement of phase boundary between the ferrite and austenite phases towards the surface. Under the ion irradiation

however

the carbon diffusion is restrained

as can be seen by comparing the irradiated samples to the non-irradiated. This effect cannot be explained by any established mechanism of radiation-influenced diffusion. An explanation based on nonlinear effect is proposed.

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