PSI - Issue 68

Swastik Soni et al. / Procedia Structural Integrity 68 (2025) 513–519 S. Soni et al. / Structural Integrity Procedia 00 (2025) 000–000

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of strain energy density calculated as area under the stress-plastic strain curve is shown in Fig. 3(a) along with ultimate tensile strength (σ UTS ) in Fig. 3(b) and the ratio σ o / σ UTS in Fig. 3(c). The σ UTS and Ф shows a decreasing trend with increasing temperature, however, the ratio σ o / σ UTS shows a constant behavior in the tested temperature range.

Fig. 2. Change in yield stress at different displacement rate and test temperature

Fig. 3. (a) Strain Energy Density VS Temperature Curve (b) UTS VS Temperature Curve (c) Ys/UTS VS Temperature Curve

Fig. 4. Change in ductility at (a) 3x10 -3 s -1 Strain rate and (b) 18x10 -3 s -1 Strain rate.