Neutron irradiation effects on mechanical properties of ITER specification tungsten  

作　　者：Dmitry Terentyev Chih-Cheng Chang Chao Yin AZinovev Xin-Fu He 

机构地区：[1]Structural Materials Group,Institute of Nuclear Materials Science,Belgian Nuclear Research Center,2400 Mol,Belgium [2]Institute of Mechanics,Materials and Civil Engineering,UCLouvain,1348 Ottignies-Louvain-la-Neuve,Belgium [3]School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China [4]China Institute of Atomic Energy,Beijing 102413,China

出　　处：《Tungsten》2021年第4期415-433,共19页钨科技（英文）

基　　金：funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053

摘　　要：In this contribution,we present the results of recent neutron irradiation campaign performed in the material test reactor BR2(Belgium)on pure tungsten.We have applied various irradiation conditions and sample geometry to assess the effect of neu-tron irradiation on hardness,bending,tensile and fracture mechanical properties.The investigated material is a commercially pure tungsten plate fabricated according to the international thermonuclear experimental reactor(ITER)specification for the application in the divertor plasma-facing components.The neutron irradiation covers a large span of temperatures and damage doses,ranging from 600 to 1200°C and 0.1-1 dpa.The obtained mechanical properties were analyzed to deduce the shift of the ductile to brittle transition temperature(DBTT)applying bending,tensile and fracture toughness-testing procedures.Then,a correlation of the fracture toughness with the change of the hardness was established.The obtained results are compared with the already published results on another ITER specification grade produced in the form of a rod.The presented and discussed results show that the performance of the compared grades in terms of the irradiation-induced embrittlement is similar,and that the irradiation in the high-temperature region(600-800°C)causes a considerable DBTT shift already at 0.2-0.5 dpa.

关 键 词：TUNGSTEN Neutron irradiation EMBRITTLEMENT 

分 类 号：TG146.411[一般工业技术—材料科学与工程]