کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7171244 | 1463707 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Size effects on uniaxial tension and multiaxial ratcheting of oligo-crystalline stainless steel thin wires
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Size effects on uniaxial tension and multiaxial ratcheting of oligo-crystalline stainless steel thin wires Size effects on uniaxial tension and multiaxial ratcheting of oligo-crystalline stainless steel thin wires](/preview/png/7171244.png)
چکیده انگلیسی
The uniaxial tensile and multiaxial ratcheting behaviors of oligo-crystalline 316L stainless steel thin wires of two diameters (190 and 90â¯Î¼m) with less than 3.5 grains across diameter were experimentally investigated. The size effect of “thinner is stronger” was observed on the yield strength, though the ultimate tensile strength and elongation were lower in the thinner wire. Under six differently combined axial stress and shear strain cycling conditions, the ratcheting strains were all found to be relatively suppressed in the thinner wire, accompanied by enhanced shear stress flow. Moreover, unlike in bulk materials, the multiaxial ratcheting strain in both thin wires tended to be loading path independent in the cases with the same shear strain amplitude, axial mean stress and stress amplitude. The mechanisms of these size effects were analyzed to be related to the surface dislocation source limitation and strain gradient hardening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 116, November 2018, Pages 163-171
Journal: International Journal of Fatigue - Volume 116, November 2018, Pages 163-171
نویسندگان
Xu Chen, Yueyin Shen, Sichao Fu, Dunji Yu, Zhe Zhang, Gang Chen,