Journal of Nuclear Materials ( IF 3.1 ) Pub Date : 2020-11-19 , DOI: 10.1016/j.jnucmat.2020.152680 Valentin K. Shamardin , Tatyana M. Bulanova , Alexander E. Fedoseev , Alexei A. Karsakov , Ruslan Z. Valiev , Marina M. Abramova , Ivan V. Smirnov , Nariman A. Enikeev
Austenitic stainless steel in conventional and ultrafine-grained states is studied by impact testing in an unirradiated condition and after neutron irradiation to 12 dpa at 350°C. We show that grain refinement provided higher resistance of the steel to the onset of evolving macrodefects (such as cracks) in irradiated state. Impact toughness of the coarse-grained steel notably degraded after irradiation, while the ultrafine-grained steel demonstrated better resistance of impact toughness to irradiation effect. This finding highlights the promising potential of ultrafine-grained steels to be used as advanced radiation resistant materials with enhanced mechanical performance.
中文翻译:
简短交流:“中子辐照对超细晶粒状态下奥氏体不锈钢冲击韧性的影响”
通过在未辐照条件下以及在350°C下将中子辐照至12 dpa后进行冲击试验,研究了常规和超细晶粒状态的奥氏体不锈钢。我们表明,晶粒细化可提高钢在辐照状态下抵抗不断发展的宏观缺陷(如裂纹)的能力。粗晶钢的冲击韧性在辐照后明显降低,而超细晶钢则表现出更好的抗冲击韧性。这一发现凸显了超细晶粒钢被用作具有增强的机械性能的先进抗辐射材料的潜力。