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Insitu investigation of tensile deformation behaviour of cold-rolled interstitial-free high-strength steel in scanning electron microscope

机译：扫描电子显微镜对冷轧无间隙高强度钢的拉伸变形行为的原位研究

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摘要

The progress of tensile deformation of cold rolled interstitial-free high-strength (IFHS) steel in the as-received and 10 pct tensile pre-strained conditions has been studied through testing of miniature sized specimens in scanning electron microscope. Strength and ductility of the steel obtained through insitu tests have been compared with the macro tensile test results. The insitu test results show that the yield strength and tensile strength of miniature sized specimens are less as compared to that of macro tensile test results. But, uniform strain in case of insitu tests is higher than that obtained in case of macro tensile specimens. The insitu tests reveal that intergranular cracking of surface grains and formation of both intergranular and transgranular voids precede the final ductile fracture. The areal density of voids is found to increase with increase of Von Mises equivalent plastic strain. Under pre-strained condition void nucleation strain of the steel is found to be lower as compared to the as-received condition.
机译：通过在扫描电子显微镜中测试小型试样，研究了冷轧无间隙高强度（IFHS）钢在原样和10 pct拉伸预应变条件下的拉伸变形进展。通过现场测试获得的钢的强度和延展性已与宏观拉伸测试结果进行了比较。原位测试结果表明，与宏观拉伸测试结果相比，微型试样的屈服强度和拉伸强度要小。但是，在原位测试的情况下，均匀应变要比在宏观拉伸试样下的均匀应变高。原位测试表明，在最终的韧性断裂之前，表面晶粒的晶间开裂以及晶间和跨晶空洞的形成。发现空隙的面密度随冯·米塞斯等效塑性应变的增加而增加。在预应变条件下，发现钢的空核形变比所接受的条件低。

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  • 来源
    《Materials Science and Engineering》 |2020年第3期|139029.1-139029.11|共11页
  • 作者

    Shreya Mukherjee; Amrita Kundu; Partha Sarathi De; Jayanta Kumar Mahato; P. C. Chakraborti; M. Shome; D. Bhattacharjee;

  • 作者单位

    Metallurgical and Material Engineering Department Jadavpur University Kolkatn 700032 India Presently at Metallurgical and Materials Engineering Department Indian Institute of Technology Kharagpur 721302 West Bengal India.;

    Metallurgical and Material Engineering Department Jadavpur University Kolkatn 700032 India;

    Metallurgical and Material Engineering Department Jadavpur University Kolkatn 700032 India Presently at Department of Engineering Design Indian Institute of Technology Madras Chennai 600036 India.;

    Metallurgical and Material Engineering Department Jadavpur University Kolkatn 700032 India Presently at Department Mechanical Engineering Department Shobhit Deemed University Meerut 250110 Uttar Pradesh India;

    R&D Division Tata Steel Ltd. Jamshedpur 831 007 India;

    New Materials Business Tata Steel Ltd. Kolkata 700071 India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Interstitial-free steel; Insitu; Scanning electron microscope; Tensile; Void nucleation strain;

    机译：无间隙钢;原位扫描电子显微镜;拉伸空隙形核应变;

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