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Author:

Peng, Lei (Peng, Lei.) | Yang, Lu (Yang, Lu.) | Wang, Meng (Wang, Meng.) | Han, Yawei (Han, Yawei.) | Yan, Qiushi (Yan, Qiushi.)

Indexed by:

Scopus SCIE

Abstract:

The goal of this study is to investigate the dynamic mechanical properties of low yield (LY) point steels (LY100, LY160, and LY225) under high strain rates and elevated temperatures. The separate Hopkinson pressure bar system was used to conduct dynamic compression tests on LY steels at temperatures ranging from 25 degrees C to 800 degrees C and strain rates ranging from 1,000 s(-1) to 5,000 s(-1). The quasi-static compression tests (0.001 s(-1)) were conducted at the same temperatures. The stress-strain relationship of the presented three materials under various temperatures and strain rates was acquired. The test results demonstrated that LY100, LY160, and LY225 steels have an obvious temperature-softening effect. The three materials show low strain rate sensitivity under the strain rate is not more than 3,000 s(-1). For a given strain rate, the flow stresses of LY100 and LY160 steel are consistent at 400 degrees C and 600 degrees C, respectively, and both materials exhibit dynamic strain aging. Besides, LY225 steel exhibits dynamic strain aging when the temperature is above 400 degrees C. According to the test results, a modified Johnson-Cook model of the LY point steels was established, which can reflect the material properties well. The results of this study may provide a basis for studying LY steels' dynamic mechanical properties. (c) 2023 American Society of Civil Engineers.

Keyword:

Dynamic strain aging Johnson-Cook model Separate Hopkinson pressure bar Low yield (LY) point steel High-temperature effect

Author Community:

  • [ 1 ] [Peng, Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Yang, Lu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Han, Yawei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Yan, Qiushi]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Meng]Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

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Source :

JOURNAL OF MATERIALS IN CIVIL ENGINEERING

ISSN: 0899-1561

Year: 2023

Issue: 5

Volume: 35

3 . 2 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:19

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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