Erosion-wear and intergranular corrosion resistance properties of AISI 304L austenitic stainless steel after low-temperature plasma nitriding

被引：51
作者：
Qin, Xujuan [1 ]
Guo, Xianglong [2 ]
Lu, Junqiang [3 ]
Chen, Liangyu [4 ]
Qin, Jining [1 ]
Lu, Weijie [1 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[3] Shanghai Nucl Engn Res & Design Inst, 29 Hongcao Rd, Shanghai 200233, Peoples R China
[4] Jiangsu Univ Sci & Technol, Sch Math & Sci, Zhenjiang 212003, Jiangsu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 698卷
关键词：
Austenitic stainless steel; Low-temperature plasma nitriding; Expanded austenitic phase; Erosion-wear; Intergranular corrosion; DL-EPR; BEHAVIOR; MICROSTRUCTURE; IMPROVEMENT; LAYER; PRECIPITATION; SENSITIZATION; ALLOY; IRON;
D O I：
10.1016/j.jallcom.2016.12.164
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, AISI 304L austenitic stainless steel has been subjected to plasma nitriding at 673 and 681 K lasted for 6, 18, 24, and 36 h. The morphology, microhardness, phase, and microstructure evolution of the nitrided layer were studied. Not only an expanded austenitic phase (gamma N) but also Cr-nitrides were formed in the nitrided layer. Transmission Electron Microscopy (TEM) study showed the formation of amorphous and nanocrystalline phases in the surface layers of the samples. The erosion-wear and intergranular corrosion (IGC) resistance behaviors of the nitrided samples were studied in detail. As compared to the non-nitrided sample, the erosion-wear resistance of the nitrided layer at normal impact angle doubles after nitriding at 673 K for 6 h, as a result of the formation of gamma N phase. Degree of sensitization (DOS) of IGC is gradually enhanced with the increase of nitriding time as indicated by a double loop electrochemical potentiokinetic reactivation (DL-EPR) measurement. This is assigned to the nanostructuring and to the Cr-depletion in the areas adjacent to the Cr-nitrides. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：1094 / 1101
页数：8
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