کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5436489 1509554 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ oxide dispersion strengthened tungsten alloys with high compressive strength and high strain-to-failure
ترجمه فارسی عنوان
در محل پراکندگی اکسید، آلیاژهای تنگستن با مقاومت فشاری بالا و مقاومت بالا به شکست، تقویت شده است
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

In this work a novel process methodology to concurrently improve the compressive strength (2078 MPa at a strain rate of 5 × 10−4 s−1) and strain-to-failure (over 40%) of bulk tungsten materials has been described. The process involves the in situ formation of intragranular tungsten oxide nanoparticles, facilitated by the application of a pressure of 1 GPa at a low sintering temperature of 1200 °C during spark plasma sintering (SPS). The results show that the application of a high pressure of 1 GPa during SPS significantly accelerates the densification process. Concurrently, the second phase oxide nanoparticles with an average grain size of 108 nm, which are distributed within the interiors of the W grains, simultaneously provide strengthening and plasticity by inhibiting grain growth, and generating, blocking, and storing dislocations.

In this work a novel process methodology to concurrently improve the compressive strength (2078 MPa at a strain rate of 5 × 10−4 s−1) and strain-to-failure (over 40%) of bulk W materials has been described. The process involves the in situ formation of intragranular tungsten oxide nanoparticles, facilitated by the application of a pressure of 1 GPa at a low sintering temperature of 1200 °C during spark plasma sintering (SPS).277

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 122, 1 January 2017, Pages 19-31
نویسندگان
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