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Microstructure and mechanical properties of a medium-carbon bainitic steel by a novel quenching and dynamic partitioning (Q-DP) process

Li, Qiangguo ; Huang, Xuefei ; Huang, Weigang

Materials Science & Engineering A, April 26, 2016, Vol.662, p.129(7) [Tạp chí có phản biện]

ISSN: 0921-5093 ; DOI: 10.1016/j.msea.2016.03.042

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  • Nhan đề:
    Microstructure and mechanical properties of a medium-carbon bainitic steel by a novel quenching and dynamic partitioning (Q-DP) process
  • Tác giả: Li, Qiangguo ; Huang, Xuefei ; Huang, Weigang
  • Chủ đề: Stress-Strain Curves – Analysis ; Stress-Strain Curves – Mechanical Properties ; Questions and Answers – Analysis ; Questions and Answers – Mechanical Properties
  • Là 1 phần của: Materials Science & Engineering A, April 26, 2016, Vol.662, p.129(7)
  • Mô tả: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.msea.2016.03.042 Byline: Qiangguo Li, Xuefei Huang, Weigang Huang Abstract: A novel Quenching and Dynamic Partitioning (Q-DP) process for a 0.3C-1.4Si-1.8Mn-1.3Cr-0.3Mo (wt%) bainitic steel was developed and the microstructure and mechanical properties were investigated. The results show that the microstructure of the Q-DP treated steel consists of bainite, martensite and retained austenite, and it exhibit a better combination of tensile strength (above 1500MPa), total elongation (above 17%) and impact toughness (above 90J). Among the different Q-DP process, the sample treated by 250[degrees]C Q-DP process exhibits the best combination of strength (1519MPa), ductility (21.3%), the product of strength and elongation (PSE, 32.4GPa%) and maximum impact toughness (108J) compared to the quenching and partitioning (Q&P) process and other Q-DP processes. In addition, the work hardening behaviors of the Q&P and Q-DP samples were investigated. The stress-strain curves show that the Q&P and 250[degrees]C Q-DP treated samples exhibit the larger uniform elongation and the value of n calculated for samples is 0.109 and 0.101 respectively. Author Affiliation: College of Materials Science and Engineering, Sichuan University, Chengdu 610065, PR China Article History: Received 24 December 2015; Revised 10 March 2016; Accepted 10 March 2016
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0921-5093 ; DOI: 10.1016/j.msea.2016.03.042

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