Tensile properties of baseline and advanced tungsten grades for fusion applications

0506320 - ÚFP 2020 RIV NL eng J - Journal Article
Yin, C. - Terentyev, D. - Pardoen, T. - Bakaeva, A. - Petrov, R. - Antusch, S. - Rieth, M. - Vilémová, Monika - Matějíček, Jiří - Zhang, T.
Tensile properties of baseline and advanced tungsten grades for fusion applications.
International Journal of Refractory Metals & Hard Materials. Roč. 75, September (2018), s. 153-162. ISSN 0263-4368. E-ISSN 2213-3917
R&D Projects: GA ČR(CZ) GA17-23154S
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : Fusion * Mechanical properties * Tungsten * Uniform elongation
OECD category: Materials engineering
Impact factor: 2.794, year: 2018
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/abs/pii/S0263436818301100?via%3Dihub

This work aims to establish a mechanical reference database of tungsten materials that are currently under assessment of their susceptibility to neutron irradiation. To obtain the mechanical properties, we performed a set of parametric tests using mini-tensile sample geometry and fracture surface analysis. Six different types of tungsten-based materials were assessed: two commercial grades produced according to ITER specifications in Europe and China i.e., Plansee (IGP) and AT&M (CEFTR), and four perspective lab-scale grades. These are grades reinforced with particles of TiC, Y 2 O 3 , and ZrC (W1TiC, W2YO, and W0.5ZC, respectively) as well as fine grain structure W (FG). Tests were performed in the temperature range 150–600 °C, selected specifically to reveal the ductile to brittle transition temperature and mechanisms of full plastic deformation. Most of the materials showed onset of the ductile behavior at 300 °C, except FG and IGP (in transverse orientation) grades. High yield strength and ultimate tensile strength were recorded for CEFTR, W0.5ZC, and W1TiC at the maximum investigated temperature (600 °C), which can be considered as promising for performance in the high-temperature regime. The lowest threshold temperature for ductility was determined to be 200 °C registered for the W0.5ZC grade, CEFTR (in longitudinal orientation) grades, and IGP (in longitudinal orientation) grades, hence demonstrating its high potential for divertor applications.
Permanent Link: http://hdl.handle.net/11104/0297596