| Title: |
Effects of pulsed laser surface remelting on microstructure, hardness and lead-bismuth corrosion behavior of a ferrite/martensitic steel |
| Authors: |
Hao Wang, Qian Yuan, Linjiang Chai, Ke Zhao, Ning Guo, Jun Xiao, Xing Yin, Bin Tang, Yuqiong Li, Shaoyu Qiu |
| Source: |
Nuclear Engineering and Technology, Vol 54, Iss 6, Pp 1972-1981 (2022) |
| Publisher Information: |
Elsevier, 2022. |
| Publication Year: |
2022 |
| Collection: |
LCC:Nuclear engineering. Atomic power |
| Subject Terms: |
Ferritic/martensitic sheet, Laser surface remelting, Microstructural characteristics, Hardness, Lead-bismuth corrosion, Nuclear engineering. Atomic power, TK9001-9401 |
| More Details: |
A typical ferritic/martensitic (F/M) steel sheet was subjected to pulsed laser surface remelting (LSR) and corrosion test in lead-bismuth eutectic (LBE) at 550 °C. There present two modification zones with distinct microstructures in the LSRed specimen: (1) remelted zone (RZ) consisting of both bulk δ-ferrite grains and martensitic plates and (2) heat-affected zone (HAZ) below the RZ, mainly composed of martensitic plates and high-density precipitates. Martensitic transformation occurs in both the RZ and the HAZ with the Kurdjumov-Sachs and Nishiyama-Wassermann orientation relationships followed concurrently, resulting in scattered orientations and specific misorientation characteristics. Hardnesses of the RZ and the HAZ are 364 ± 7 HV and 451 ± 15 HV, respectively, considerably higher than that of the matrix (267 ± 3 HV). In oxygen-saturated and oxygen-depleted LBE, thicknesses of oxide layers developed on both the as-received and the LSRed specimens increase with prolonging corrosion time (oxide layers always thinner under the oxygen-depleted condition). The corrosion resistance of the LSRed F/M steel in oxygen-saturated LBE is improved, which can be attributed to the grain-refinement accelerated formation of dense Fe–Cr spinel. In oxygen-depleted LBE, the growth of oxide layers is very low with both types of specimens showing similar corrosion resistance. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1738-5733 |
| Relation: |
http://www.sciencedirect.com/science/article/pii/S1738573321006999; https://doaj.org/toc/1738-5733 |
| DOI: |
10.1016/j.net.2021.12.030 |
| Access URL: |
https://doaj.org/article/165c3e129e1b4248ab2587c3e59b058d |
| Accession Number: |
edsdoj.165c3e129e1b4248ab2587c3e59b058d |
| Database: |
Directory of Open Access Journals |
