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首页> 外文会议>The 3rd International Symposium on Material Chemistry in Nuclear Environment (Material Chemistry '02 MC'02) Mar 13-15, 2002 Tsukuba >EFFECT OF TRIPLE ION BEAM IRRADIATION ON MECHANICAL PROPERTIES OF HIGH CHROMIUM AUSTENITIC STAINLESS STEEL
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EFFECT OF TRIPLE ION BEAM IRRADIATION ON MECHANICAL PROPERTIES OF HIGH CHROMIUM AUSTENITIC STAINLESS STEEL

机译：三重离子束辐照对高铬奥氏体不锈钢力学性能的影响

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摘要

A high-chromium austenitic stainless steel has been developed for an advanced fuel cladding tube considering waterside corrosion and irradiation embrittlement. The candidate material was irradiated in triple ion (Ni, He, H) beam modes at 573K up to 50dpa to simulate irradiation damage by neutron and transmutation product. The change in hardness of the very shallow surface layer of the irradiated specimen was estimated from the slope of load/depth-depth curve which is in direct proportion to the apparent hardness of the specimen. Besides, the Swift's power low constitutive equation (σ=A(ε_0+ε)~n, A: strength coefficient, ε_0: equivalent strain by cold rolling, n: strain hardening exponent) of the damaged parts was derived from the indentation test combined with an inverse analysis using a finite element method (FEM). For comparison, Type304 stainless steel was investigated as well. Though both Type304SS and candidate material were also hardened by ion irradiation, the increase in apparent hardness of the candidate material was smaller than that of Type304SS. The yield stress and uniform elongation were estimated from the calculated constitutive equation by FEM inverse analysis. The irradiation hardening of the candidate material by irradiation can be expected to be lower than that of Type304SS.
机译：考虑到水边腐蚀和辐射脆化，已经开发出一种用于高级燃料包壳管的高铬奥氏体不锈钢。候选材料以573K的三离子（Ni，He，H）束模式辐照至50dpa，以模拟中子和trans变产物对辐照的损害。根据载荷/深度-深度曲线的斜率估算出被辐照样品非常浅的表面层的硬度变化，该斜率与样品的表观硬度成正比。另外，结合压痕试验推导了损伤部位的斯威夫特幂低本构方程（σ= A（ε_0+ε）〜n，A：强度系数，ε_0：冷轧当量应变，n：应变硬化指数）。使用有限元方法（FEM）进行反分析。为了进行比较，还研究了304型不锈钢。尽管304SS型和候选材料也都通过离子辐照硬化，但是候选材料的表观硬度的增加小于304SS型。通过有限元反分析，由计算出的本构方程估算屈服应力和均匀伸长率。可以预期，通过辐照进行的候选材料的辐照硬化将低于304SS型。

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