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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Quantification of the constitutive relationship of high-energy heavy-ion irradiated SS316L using the small punch test
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Quantification of the constitutive relationship of high-energy heavy-ion irradiated SS316L using the small punch test

机译：用小冲击试验量化高能量重离子辐照SS316L的本构关系

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Heavy-ion irradiation has been widely used to simulate neutrons-irradiation induced damage effects, due to its higher damage rate and lower activation of the post-irradiation manipulation. The high-energy ion beam is capable of producing a thickness of dozens of microns damaged region in steel, making it possible to evaluate the macroscopic mechanical properties of the irradiated specimens. In the present paper, a method to quantify the constitutive relationships of high-energy heavy-ion irradiated steels is proposed. Ni22+ ions with a kinetic energy of 357.86 MeV provided by a cyclotron were used to produce a quasi-homogeneous atomic displacement damaged layer (about 25 mm in thickness) in specimens of 316 L stainless steel. The temperature of the specimens were kept at about -50 degrees C during ion irradiation. Two damage levels of 0.16 and 0.33 displacement per atom (dpa) were approached. Small punch test of the unirradiated and irradiated phi 3 mm disk samples was carried out to obtain the load-deflection curves. A series of finite element simulation of SPT of the laminated irradiated samples, in combination with sequential programming algorithm, was performed to characterize the constitutive relationships of the irradiation damaged layer of the samples. Finite element simulations with obtained constitutive relationships show agreement with the experimental results. Nanoindentation tests were carried out to verify the identified constitutive relationships. The nanoindentation results show an irradiation induced hardening in good agreement with that from the obtained constitutive relationships. (C) 2020 Elsevier B.V. All rights reserved.
机译：重离子辐照已经被广泛用于模拟中子照射诱导的损伤的效果，由于其较高的损坏率与照射后操纵下活化。高能量离子束能够产生厚度几十损坏在钢区域微米的，使得可以评价被照射样本的宏观机械性能。在本文件中，一种方法来量化高能重离子辐照钢的本构关系提出。 Ni22 +离子与由回旋加速器提供357.86兆电子伏动能被用来产生在316升的不锈钢制试件的准均匀的原子置换受损层（约25mm厚）。离子照射过程中样品的温度保持在约-50摄氏度。的0.16两个损害水平和每个原子（DPA）0.33位移进行了接触。未照射和照射的披3mm的圆盘样品的小冲杆试验进行以获得载荷 - 挠度曲线。该一系列的层叠照射样品的SPT的有限元模拟的，在具有顺序编程算法组合，进行以表征样本的照射损伤层的组成的关系。用获得的本构关系的有限元仿真与实验结果一致。纳米压痕试验进行了验证标识的本构关系。纳米压痕结果表明诱导与从所获得的本构关系一致硬化的照射。 （c）2020 Elsevier B.v.保留所有权利。

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