Nanoindentation and nanoscratch of a thermal oxide layer on a FeAl alloy

2020-02-19 19:01:24

layer Iron oxide hardness scratch

责任者: Xia, J.;Li, C.X.;Dong, H.;Bell, T. 单位: Dept. of Metall. & Mater., Univ. of Birmingham, UK 来源出处: Journal of Materials Research(J. Mater. Res. (USA)),2004/01/,19(1):291-300 摘要: An iron aluminide (Fe-40 at.% Al) was thermal oxidation (TO)-treated at 1000°C for 30 to 150 h. The mechanical properties (e.g., hardness and elastic modulus), the scratch resistance, the deformation and damage behaviors of the TO-treated surface layers were evaluated using nanoindentation and nanoscratch techniques. It has been found that the TO treatment produced an oxide layer containing α-Al2O3 on the iron aluminide surface, which increased the surface hardness (H) and elastic modulus (Er) but reduced the ratio of Er/H. This has significantly improved the scratch resistance of the iron aluminide. Longer treatment resulted in a thicker oxide layer and led to further reduced scratch rate and an increased critical load to failure. The scratch resistance has been correlated with the scratch load, the hardness, and the Er/H ratio of the surface oxide layer 关键词: aluminium alloys;elastic deformation;elastic moduli;hardness;indentation;iron alloys;oxidation;nanoindentation;nanoscratch resistance;thermal oxide layer;FeAl alloy;iron aluminide;thermal oxidation;mechanical properties;surface hardness;elastic modulus;deformation;scratch load;1000 degC;30 to 150 h;FeAl