Temperature dependence of transgranular fatigue crack resistance in interstitial-free steel and Fe-C steels with supersaturated carbon: Effects of dynamic strain aging and dynamic precipitation

Bochuan Li, Motomichi Koyama, Eisaku Sakurada, Nobuyuki Yoshimura, Kohsaku Ushioda, Hiroshi Noguchi

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)1-9
Number of pages9
JournalInternational Journal of Fatigue
Volume110
DOIs
Publication statusPublished - May 2018

Fingerprint

Fatigue Crack
Steel
Temperature Dependence
Carbon steel
Carbon
Aging of materials
Hardening
Crack Closure
Temperature
Crack closure
Age hardening
Ferritic steel
Growth temperature
Stress Intensity Factor
Stress intensity factors
Roughness
Heating
Solid solutions
Crack
Surface roughness

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Temperature dependence of transgranular fatigue crack resistance in interstitial-free steel and Fe-C steels with supersaturated carbon : Effects of dynamic strain aging and dynamic precipitation. / Li, Bochuan; Koyama, Motomichi; Sakurada, Eisaku; Yoshimura, Nobuyuki; Ushioda, Kohsaku; Noguchi, Hiroshi.

In: International Journal of Fatigue, Vol. 110, 05.2018, p. 1-9.

Research output: Contribution to journalArticle

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AU - Sakurada, Eisaku

AU - Yoshimura, Nobuyuki

AU - Ushioda, Kohsaku

AU - Noguchi, Hiroshi

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AB - 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.

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