Metallographic etching and microstructure characterization of NiCrMoV rotor steels for nuclear power
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第12期
论文作者：Peng Liu Feng-gui Lu Xia Liu Yu-lai Gao
文章页码：1164 - 1169
摘 要：The grain size of prior austenite has a distinct influence on the microstructure and final mechanical properties of steels.Thus,it is significant to clearly reveal the grain boundaries and therefore to precisely characterize the grain size of prior austenite.For NiCrMoV rotor steels quenched and tempered at high temperature,it is really di?cult to display the grain boundaries of prior austenite clearly,which limits a further study on the correlation between the properties and the corresponding microstructure.In this paper,an effective etchant was put forward and further optimized.Experimental results indicated that this agent was effective to show the details of grain boundaries,which help analyze fatigue crack details along the propagation path.The optimized corrosion agent is successful to observe the microstructure characteristics and expected to help analyze the effect of microstructure for a further study on the mechanical properties of NiCrMoV rotor steels used in the field of nuclear power.
Peng Liu1，Feng-gui Lu2，Xia Liu3，Yu-lai Gao1
1. School of Materials Science and Engineering,Shanghai University2. School of Materials Science and Engineering,Shanghai Jiao Tong University3. Shanghai Turbine Plant
摘 要：The grain size of prior austenite has a distinct influence on the microstructure and final mechanical properties of steels.Thus,it is significant to clearly reveal the grain boundaries and therefore to precisely characterize the grain size of prior austenite.For NiCrMoV rotor steels quenched and tempered at high temperature,it is really di?cult to display the grain boundaries of prior austenite clearly,which limits a further study on the correlation between the properties and the corresponding microstructure.In this paper,an effective etchant was put forward and further optimized.Experimental results indicated that this agent was effective to show the details of grain boundaries,which help analyze fatigue crack details along the propagation path.The optimized corrosion agent is successful to observe the microstructure characteristics and expected to help analyze the effect of microstructure for a further study on the mechanical properties of NiCrMoV rotor steels used in the field of nuclear power.
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