کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467716 | 1518619 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface nanostructure and improved microhardness of 40CrNiMo7 steel induced by high current pulsed electron beam treatment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, surface modification of 40CrNiMo7 steel was investigated with high current pulsed electron beam (HCPEB) treatment. The scanning electron microscope (SEM), electron back-scattered diffraction (EBSD), electron probe micro analysis (EPMA), transmission electron microscopy (TEM) and X-ray diffraction (XRD) results show that a composite microstructure of mainly refined austenite and a little martensite was produced in the surface modified layer of depth â¼7 µm. The average size of small cells on modified surface was decreased to â¼120 nm after 25 HCPEB pulses. XRD analysis indicates a preferred orientation of austenite (2 2 0) crystal plane, and TEM results show the broken and dissolved cementite in the surface modified layer. After HCPEB treatment, all the samples exhibited a remarkable improvement in surface microhardness measurement, up to â¼1000 HK for 15 HCPEB pulses, as tripled of the initial 40CrNiMo7 steel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 403, 15 July 2017, Pages 45-50
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 403, 15 July 2017, Pages 45-50
نویسندگان
Huihui Wang, Shengzhi Hao,