Microstructural, mechanical, and electrochemical analysis of carbon doped AISI carbon steels

Q3 Immunology and Microbiology Applied Microscopy Pub Date : 2022-10-20 DOI:10.1186/s42649-022-00079-w

Muhammad Ishtiaq, Aqil Inam, Saurabh Tiwari, Jae Bok Seol

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Abstract

The effect of carbon doping contents on the microstructure, hardness, and corrosion properties of heat-treated AISI steel grades of plain carbon steel was investigated in this study. Various microstructures including coarse ferrite-pearlite, fine ferrite-pearlite, martensite, and bainite were developed by different heat treatments i.e. annealing, normalizing, quenching, and austempering, respectively. The developed microstructures, micro-hardness, and corrosion properties were investigated by a light optical microscope, scanning electron microscope, electromechanical (Vickers Hardness tester), and electrochemical (Gamry Potentiostat) equipment, respectively. The highest corrosion rates were observed in bainitic microstructures (2.68–12.12 mpy), whereas the lowest were found in the fine ferritic-pearlitic microstructures (1.57–6.36 mpy). A direct correlation has been observed between carbon concentration and corrosion rate, i.e. carbon content resulted in an increase in corrosion rate (2.37 mpy for AISI 1020 to 9.67 mpy for AISI 1050 in annealed condition).

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碳掺杂AISI碳钢的显微结构、力学和电化学分析

研究了碳掺杂含量对经热处理的普通碳钢AISI钢的显微组织、硬度和腐蚀性能的影响。通过退火、正火、淬火和等温回火处理，形成了粗铁素体-珠光体、细铁素体-珠光体、马氏体和贝氏体等多种显微组织。分别用光学显微镜、扫描电镜、机电(维氏硬度计)和电化学(Gamry恒电位器)对制备的材料的显微组织、显微硬度和腐蚀性能进行了研究。贝氏体组织的腐蚀速率最高(2.68 ~ 12.12 mpy)，细铁素体-珠光体组织的腐蚀速率最低(1.57 ~ 6.36 mpy)。碳浓度与腐蚀速率直接相关，即碳含量导致腐蚀速率增加(在退火条件下，AISI 1020为2.37 mpy, AISI 1050为9.67 mpy)。

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来源期刊

Applied Microscopy Immunology and Microbiology-Applied Microbiology and Biotechnology

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Applied Microscopy is a peer-reviewed journal sponsored by the Korean Society of Microscopy. The journal covers all the interdisciplinary fields of technological developments in new microscopy methods and instrumentation and their applications to biological or materials science for determining structure and chemistry. ISSN: 22875123, 22874445.