کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7969266 | 1514349 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneously improving mechanical properties and corrosion resistance of pure Ti by continuous ECAP plus short-duration annealing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work investigated the effect of short-duration annealing on mechanical properties and corrosion behavior of bulk ultrafine-grained (UFG) pure Ti (grade 2) produced by high-efficiency equal-channel angular pressing (ECAP), serving the fast developing of marine industries. The initial coarse-grained (CG) Ti achieved higher strength after continuous ECAP at 420â¯Â°C for 4 passes, while additional short-duration annealing at 300â¯Â°C for 15â¯min of UFG Ti further led to extraordinary improvement of strength, which was associated with texture strengthening. The yield strength was increased from 362â¯MPa in as-received state to 561â¯MPa in post-ECAP annealed condition, and ultimate tensile strength from 450â¯MPa to 663â¯MPa. The ECAP-processed UFG Ti had better corrosion resistance in artificial seawater than the initial CG Ti. Short-duration annealing further improved the corrosion resistance of UFG Ti, which was related to stronger basal texture. The corrosion current density decreased from 68.37â¯nAâ¯cmâ2 for CG Ti in as-received condition to 41.77â¯nAâ¯cmâ2 for UFG Ti processed by ECAP plus short-duration annealing. The fraction of TiO2 within the surface oxide film for the post-ECAP annealed sample was increased. The bulk UFG Ti after post-ECAP short-duration annealing revealed an excellent combination of high strength, good ductility and superior corrosion resistance for marine applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 138, April 2018, Pages 38-47
Journal: Materials Characterization - Volume 138, April 2018, Pages 38-47
نویسندگان
Yanxia Gu, Aibin Ma, Jinghua Jiang, Huiyun Li, Dan Song, Haoran Wu, Yuchun Yuan,