PSI - Issue 14

7

Santosh Kumar et al. / Procedia Structural Integrity 14 (2019) 872–882 Santosh / Structural Integrity Procedia 00 (2018) 000–000

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Fig. 11. Carbide distribution at higher hardness level A) CR B) SF

Carbide analysis for both the materials at both hardness ranges was carried out. The same at lower hardness range and higher hardness range is shown in Fig. 10 and Fig. 11, respectively. EDS (Energy Dispersive Spectroscopy) analysis was carried out for a single point on the precipitate as well as elemental mapping was also used for both the materials to analyse the type of carbide. Single point EDS results are shown in Fig. 12, while elemental map of the area around precipitate are shown in Figure 13. The precipitates were confirmed to be Vanadium carbides by both techniques. At lower hardness range, an average carbide size of 300 nm and 1.1 µm is obtained for CR and SF route material, respectively. An average carbide size of 800 nm and 1.4 µm was obtained for CR and SF route material, respectively at higher hardness range.

Fig. 12 EDS analysis of A) CR B) SF route material