High-temperature tensile and thermal shock characterization of low-temperature rolled tungsten

Ma, Xiaolei; Zhang, Xiaoxin; Feng, Fan; Wang, Ting; Liu, Xiang; Wang, Jianbao; Lv, Wei; Lang, Shaoting; Chen, Ge; Yan, Qingzhi

doi:10.1016/j.nme.2022.101353

Cited by 2 publications

(1 citation statement)

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“…For example, Tsuchida et al [58] reported that the KW has smaller grains than PW because K bubbles inhibit grain growth during manufacturing processes of W as well as recrystallization due to the pinning effect. Our previous publications also proved this, and the grain sizes of PW and KW can be found in [59,60], which are 9.82 and 2.81 µm, respectively. This means that KW has more grain boundaries that can provide more trapping sites for D, which thus facilitates the formation of surface blisters.…”

Section: Effect Of Fe 11+ Pre-damage On Surface Morphology Evolution ...supporting

confidence: 67%

Decreased surface blistering and deuterium retention in potassium-doped tungsten exposed to deuterium plasma following ion irradiation

Zhang

Wang

et al. 2023

Nucl. Fusion

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A large-size potassium-doped tungsten (KW) plate with a thickness of 15 mm was fabricated via powder metallurgy technology and hot rolling. In order to appraise the irradiation resistance of KW, the surface deuterium (D) blistering and D retention were studied on Fe11+ pre-damaged (0, 0.05 & 0.5 dpa) KW and pure tungsten (PW), which were exposed to ~60 eV and ~ 5 × 1021 m-2 s-1 D plasmas at 500 K to a fluence of ~ 5.76 × 1025 m-2. The results indicated that the KW alloy can inhibit the generation of vacancy defects after Fe11+ ion damage compared with PW because K bubbles can restrain the migration of W self-interstitial atoms and the accumulation of vacancies caused during Fe11+ ion irradiation. The Fe11+ ions pre-damage can relieve the surface blistering and D retention of PW and KW at the same time and the KW has a better effect on inhibiting D retention, while does not shows a significant advantage for inhibiting surface blistering compared with PW. Besides, the causes for the discrepancy in total D retention and surface morphology evolution of PW and KW were discussed in detail.

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Section: Effect Of Fe 11+ Pre-damage On Surface Morphology Evolution ...supporting

confidence: 67%