Microstructure of a 14Cr-ODS ferritic steel before and after helium ion implantation

Chenyang Lu; Zheng Lu; Rui Xie; Chunming Liu; Lumin Wang

doi:10.1016/j.jnucmat.2014.06.065

Microstructure of a 14Cr-ODS ferritic steel before and after helium ion implantation

Chenyang Lu
, Zheng Lu
, Rui Xie
, Chunming Liu
, Lumin Wang

Northeastern University China
University of Michigan, Ann Arbor

Research output: Contribution to journal › Article › peer-review

77 Scopus citations

Abstract

A 14Cr-ODS ferritic steel with the nominal compositions of Fe-14Cr-2 W-0.3Ti-0.3Y₂O₃ (wt.%) was produced by mechanical alloying (MA) and hot isostatic pressing (HIP). Helium ion was implanted into the 14Cr-ODS steel along with Eurofer 97 steel as reference at 400 °C to a fluence of 1 × 10¹⁷ He⁺/cm². High resolution transmission electron microscopy (HRTEM), high angle annual dark field (HAADF) scanning TEM (STEM) and atom probe tomography (APT) were used to characterize the microstructure of 14Cr-ODS and Eurofer 97 steels before and after helium implantation. High-density Y-Ti-O-rich nanoclusters and Y ₂Ti₂O₇ precipitates as well as large Cr-Ti rich oxides were observed in the 14Cr-ODS steel. The average size of Y-Ti-O nanoclusters and Y₂Ti₂O₇ precipitates is 9 nm. After helium implantation, the helium bubbles formed in the 14Cr-ODS steel exhibit the smaller size and the lower volume fraction than that in Eurofer 97 steel, indicating high-density nano-scale precipitates can effectively suppress the coarsening of helium bubbles.

Original language	English
Pages (from-to)	366-370
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	455
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2014.06.065
State	Published - Dec 2014
Externally published	Yes

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@article{2be1c7ebfbee445292d4019c47dc142a,

title = "Microstructure of a 14Cr-ODS ferritic steel before and after helium ion implantation",

abstract = "A 14Cr-ODS ferritic steel with the nominal compositions of Fe-14Cr-2 W-0.3Ti-0.3Y2O3 (wt.\%) was produced by mechanical alloying (MA) and hot isostatic pressing (HIP). Helium ion was implanted into the 14Cr-ODS steel along with Eurofer 97 steel as reference at 400 °C to a fluence of 1 {\texttimes} 1017 He+/cm2. High resolution transmission electron microscopy (HRTEM), high angle annual dark field (HAADF) scanning TEM (STEM) and atom probe tomography (APT) were used to characterize the microstructure of 14Cr-ODS and Eurofer 97 steels before and after helium implantation. High-density Y-Ti-O-rich nanoclusters and Y 2Ti2O7 precipitates as well as large Cr-Ti rich oxides were observed in the 14Cr-ODS steel. The average size of Y-Ti-O nanoclusters and Y2Ti2O7 precipitates is 9 nm. After helium implantation, the helium bubbles formed in the 14Cr-ODS steel exhibit the smaller size and the lower volume fraction than that in Eurofer 97 steel, indicating high-density nano-scale precipitates can effectively suppress the coarsening of helium bubbles.",

author = "Chenyang Lu and Zheng Lu and Rui Xie and Chunming Liu and Lumin Wang",

year = "2014",

month = dec,

doi = "10.1016/j.jnucmat.2014.06.065",

language = "英语",

volume = "455",

pages = "366--370",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "1-3",

}

TY - JOUR

T1 - Microstructure of a 14Cr-ODS ferritic steel before and after helium ion implantation

AU - Lu, Chenyang

AU - Lu, Zheng

AU - Xie, Rui

AU - Liu, Chunming

AU - Wang, Lumin

PY - 2014/12

Y1 - 2014/12

N2 - A 14Cr-ODS ferritic steel with the nominal compositions of Fe-14Cr-2 W-0.3Ti-0.3Y2O3 (wt.%) was produced by mechanical alloying (MA) and hot isostatic pressing (HIP). Helium ion was implanted into the 14Cr-ODS steel along with Eurofer 97 steel as reference at 400 °C to a fluence of 1 × 1017 He+/cm2. High resolution transmission electron microscopy (HRTEM), high angle annual dark field (HAADF) scanning TEM (STEM) and atom probe tomography (APT) were used to characterize the microstructure of 14Cr-ODS and Eurofer 97 steels before and after helium implantation. High-density Y-Ti-O-rich nanoclusters and Y 2Ti2O7 precipitates as well as large Cr-Ti rich oxides were observed in the 14Cr-ODS steel. The average size of Y-Ti-O nanoclusters and Y2Ti2O7 precipitates is 9 nm. After helium implantation, the helium bubbles formed in the 14Cr-ODS steel exhibit the smaller size and the lower volume fraction than that in Eurofer 97 steel, indicating high-density nano-scale precipitates can effectively suppress the coarsening of helium bubbles.

AB - A 14Cr-ODS ferritic steel with the nominal compositions of Fe-14Cr-2 W-0.3Ti-0.3Y2O3 (wt.%) was produced by mechanical alloying (MA) and hot isostatic pressing (HIP). Helium ion was implanted into the 14Cr-ODS steel along with Eurofer 97 steel as reference at 400 °C to a fluence of 1 × 1017 He+/cm2. High resolution transmission electron microscopy (HRTEM), high angle annual dark field (HAADF) scanning TEM (STEM) and atom probe tomography (APT) were used to characterize the microstructure of 14Cr-ODS and Eurofer 97 steels before and after helium implantation. High-density Y-Ti-O-rich nanoclusters and Y 2Ti2O7 precipitates as well as large Cr-Ti rich oxides were observed in the 14Cr-ODS steel. The average size of Y-Ti-O nanoclusters and Y2Ti2O7 precipitates is 9 nm. After helium implantation, the helium bubbles formed in the 14Cr-ODS steel exhibit the smaller size and the lower volume fraction than that in Eurofer 97 steel, indicating high-density nano-scale precipitates can effectively suppress the coarsening of helium bubbles.

UR - https://www.scopus.com/pages/publications/84905187262

U2 - 10.1016/j.jnucmat.2014.06.065

DO - 10.1016/j.jnucmat.2014.06.065

M3 - 文章

AN - SCOPUS:84905187262

SN - 0022-3115

VL - 455

SP - 366

EP - 370

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3

ER -

Microstructure of a 14Cr-ODS ferritic steel before and after helium ion implantation

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