Effect of N on the precipitation behaviours of the reduced activation ferritic/martensitic steel CLF-1 after thermal ageing

Wang, Pinghuai; Chen, Jiming; Fu, Haiying; Liu, Shi; Li, Xiongwei; Xu, Zhengyang

doi:10.1016/j.jnucmat.2013.03.081

Cited by 66 publications

(10 citation statements)

References 15 publications

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“…5 and 0.7 at.%. The W concentration in the here investigated CLF-1 steel is about 1.5 %[20]. The decrease in sputtering yield with increasing exposure fluence is assumed to be due to W enrichment, which will be further confirmed by the following TEM and RBS results.…”

supporting

confidence: 77%

Erosion and deuterium retention of CLF-1 steel exposed to deuterium plasma

Qiao

Wang

et al. 2017

Phys. Scr.

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In recent years reduced activation ferritic martensitic (RAFM) steel has been proposed as plasma-facing material (PFM) in remote regions of the first wall. This study reports the erosion and deuterium retention behaviours in CLF-1 steel exposed to deuterium (D) plasma in a linear experimental plasma system as function of incident ion energy and fluence. The incident D ion energy ranges from 30 to180 eV at a flux of 4×10 21 D/(m 2 s) up to a fluence of 10 25 D/m 2. SEM images revealed a clear change of the surface morphology as functions of incident fluence and impinging energy. The mass loss results showed a decrease of the total sputtering yield of CLF-1 steel with increasing incident fluence by up to one order of magnitude. The total sputtering yield of CLF-1 steel after 7.2×10 24 D/m 2 deuterium plasma exposure reduced by a factor of 4 compared with that of pure iron, which can be attributed to the enrichment of W at the surface due to preferential sputtering of iron and chromium. After D plasma exposure, the total deuterium retention in CLF-1 steel samples measured by TDS decreased with increasing incident fluence and energy, and a clear saturation tendency as function of incident fluence or energy was also observed.

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supporting

confidence: 77%

Erosion and deuterium retention of CLF-1 steel exposed to deuterium plasma

Qiao

Wang

et al. 2017

Phys. Scr.

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“…After subsequent tempering, the S98 and S209 showed a drastic increase in elongation with the sacrifice of TYS, but still comparable to the wrought CLF-1 steel. The data for various RAFM steels fabricated by SLM [9] and conventional methods [18][19][20][21][22][23][24], as well as the present tensile properties are included for comparison in Figure 3(b). Apparently, the S209 exhibited an excellent combination of strength and ductility, which sets the present CLF-1 steel apart from all the previously reported RAFM steels.…”

Section: Resultsmentioning

confidence: 99%

“…(a) Room temperature engineering stress-strain curves. (b) Relationship between TYS and elongation of various RAFM steels, including SLM-built[9] and conventionally processed[18][19][20][21][22][23][24] steels, as well as the present tensile properties.…”

mentioning

confidence: 99%

Strong and ductile reduced activation ferritic/martensitic steel additively manufactured by selective laser melting

Jiang

Chen

Tong

et al. 2019

Materials Research Letters

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Selective laser melting (SLM) was successfully applied to fabricate strong and ductile reduced activation ferritic/martensitic (RAFM) steel by introducing heterogeneous multi-/bimodal microstructure. The SLM-built RAFM steel exhibited an excellent combination of strength and ductility (i.e. yield strength of 1053 ± 4.7 MPa and elongation of 16.9 ± 0.4%), well surpassing the previously reported counterparts. The superior strength was expected from the refined grains and lath martensites, and the high ductility was associated with the improved dislocation-controlled strain hardening capability. This work provides a basis for developing high-performance RAFM steel by microstructural design via SLM. IMPACT STATEMENT A new strategy, refers to heterogeneous multi-/bimodal microstructure, is proposed to develop strong and ductile RAFM steel via SLM and the achieved superior mechanical properties overcome the classic strength-ductility trade-off.

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“…Microstructural observation results show that thermal ageing strongly affects precipitation behaviors, specifically, M23C6 carbides coarsen and agglomerate along the lath boundaries and prior austenitic grain boundaries, but no obvious increase of the MX-type precipitates are observed. The coarsening and agglomeration of M23C6 seem to be the reason for the deterioration of impact properties after long-term thermal ageing [12] .…”

Section: Clf-1 Databases To Support the Design Of The Cn Hccb Tbmmentioning

confidence: 95%

Technical Issues for the Fabrication of a CN-HCCB-TBM Based on RAFM Steel CLF-1

Wang

Chen

et al. 2013

Plasma Sci. Technol.

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Reduced activation ferritic/martensitic steel (RAFM) is recognized as the primary candidate structural material for ITER's test blanket module (TBM). To provide a material and property database for the design and fabrication of the Chinese helium cooled ceramic breeding TBM (CN HCCB TBM), a type of RAFM steel named CLF-1 was developed and characterized at the Southwestern Institute of Physics (SWIP), China. In this paper, the R&D status of CLF-1 steel and the technical issues in using CLF-1 steel to manufacture CN HCCB TBM were reviewed, including the steel manufacture and different welding technologies. Several kinds of property data have been obtained for its application to the design of the ITER TBM.

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Effect of N on the precipitation behaviours of the reduced activation ferritic/martensitic steel CLF-1 after thermal ageing

Cited by 66 publications

References 15 publications

Erosion and deuterium retention of CLF-1 steel exposed to deuterium plasma

Erosion and deuterium retention of CLF-1 steel exposed to deuterium plasma

Strong and ductile reduced activation ferritic/martensitic steel additively manufactured by selective laser melting

Technical Issues for the Fabrication of a CN-HCCB-TBM Based on RAFM Steel CLF-1

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