Abstract
Tension tests at different temperatures were conducted for two ferritic steels: Fe-0.017C with 0.017% solute carbon content and interstitial-free (IF) steels. It is verified the occurrence of dynamic strain aging (DSA) in Fe-0.017C at high temperatures. Tension tests for the Fe-0.017C, following corresponding heating treatments, demonstrated the transition process of dynamic precipitation from under-aging to over-aging. Moreover, the threshold stress intensity factor ranges (ΔKth) of a small crack for these two steels both decrease with temperature growth. However, the ΔKth of Fe-0.017C was always larger than that of IF steel owing to solid solution hardening and DSA at 293 and 333 K and roughness-induced crack closure and precipitation hardening at 433 K.
Original language | English |
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Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | International Journal of Fatigue |
Volume | 110 |
DOIs | |
Publication status | Published - 2018 May |
Externally published | Yes |
Keywords
- Dynamic precipitation
- Dynamic strain aging
- Interstitial solute carbon
- Roughness-induced crack closure
- Threshold stress intensity factor ranges
ASJC Scopus subject areas
- Modelling and Simulation
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering