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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Performance of a ferritic/martensitic steel for nuclear reactor applications fabricated using additive manufacturing
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Performance of a ferritic/martensitic steel for nuclear reactor applications fabricated using additive manufacturing

机译：用于使用添加剂制造制造的核反应堆应用的铁素体/马氏体钢的性能

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摘要

Ferritic/martensitic (FM) steels are being targeted for use in a range of advanced reactor concepts as cladding and structural components. FM steels for nuclear reactor applications have historically been produced using traditional methods (e.g., casting and forging), but recently, additive manufacturing processes have become of interest for making FM-based components. Here, the laser-blown-powder additive manufacturing process was used to fabricate an FM steel, HT9, followed by microstructural and mechanical performance evaluations to determine the viability of future use of additive manufacturing for FM-based component fabrication. Results showed that the as-built condition formed a layered structure with alternating layers of 8-ferrite and martensite, which resulted in anisotropic engineering and true-stress, true-strain mechanical performance. Post-build normalizing and tempering treatments alerted the prior austenite grain size and precipitate distributions, and drove the mechanical performance to near-isotropic properties that mimic wrought-processed properties. The resulting microstructures in all conditions were rationalized in the context of multi-pass welding and the synergies are discussed. (C) 2019 Published by Elsevier B.V.
机译：铁素体/马氏体（FM）钢正在针对在多种先进的反应器概念包层和结构部件使用。 FM钢核反应堆应用在历史上一直采用传统的方法（例如，铸造和锻造）产生的，但最近，添加剂的制造工艺已经成为用于基于FM-部件的兴趣。在此，使用激光吹塑粉末添加剂的制造过程来制造的FM钢，HT9，随后微结构和机械性能的评估，以确定将来的使用添加剂的制造用于基于FM-构件制造的可行性。结果表明，已建成的条件形成具有8铁素体和马氏体的交替层，导致在各向异性工程和真应力，真应变机械性能的层状结构。生成后正火和回火处理提醒旧奥氏体粒径和析出物的分布，并且驾驶机械性能到近各向同性性能模拟锻造加工性能。在各种条件下所得到的微结构在多道焊接的上下文中进行合理化和协同作用进行了讨论。 （c）2019年由elestvier b.v发布。

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