292
G. Dharmalingam et al.
Fig. 6 Hot pressed alloy B TEM with EDS analysis-I (a and c) (b) SAD patterns of complex oxides
particles-II
in Figs. 5b and 6b. The above-said results observed that the addition of aluminium
content causes increases in the size of oxide particles and a decrease in the density
which leads to the diminution of the strength of ferritic ODS steel alloys. Lee et al.
[9] similar kinds of results were observed.
3.4 Hardness of the Hot-Pressed Alloys
Chemical composition has also influenced the hardness of the hot-pressed steels.
Alloy A has a higher hardness of 870 VHN 5 than the alloy B 764 (VHN 5 ) which
is shown in Fig. 7. Fine Y–Zr–Ti–O complex oxide in the aluminium-free ferritic
steel (alloy A) enhanced hardness and strength by the dispersion strengthening effect,
which was reported by several researchers (García-Junceda et al. 2016). Aluminiumfree (Alloy A) 17 Cr ferritic steel has 12% higher hardness than the aluminiumcontained (alloy B) ferritic steel at the pressure level of 60 MPa were observed.
G. Dharmalingam et al.
Fig. 6 Hot pressed alloy B TEM with EDS analysis-I (a and c) (b) SAD patterns of complex oxides
particles-II
in Figs. 5b and 6b. The above-said results observed that the addition of aluminium
content causes increases in the size of oxide particles and a decrease in the density
which leads to the diminution of the strength of ferritic ODS steel alloys. Lee et al.
[9] similar kinds of results were observed.
3.4 Hardness of the Hot-Pressed Alloys
Chemical composition has also influenced the hardness of the hot-pressed steels.
Alloy A has a higher hardness of 870 VHN 5 than the alloy B 764 (VHN 5 ) which
is shown in Fig. 7. Fine Y–Zr–Ti–O complex oxide in the aluminium-free ferritic
steel (alloy A) enhanced hardness and strength by the dispersion strengthening effect,
which was reported by several researchers (García-Junceda et al. 2016). Aluminiumfree (Alloy A) 17 Cr ferritic steel has 12% higher hardness than the aluminiumcontained (alloy B) ferritic steel at the pressure level of 60 MPa were observed.