کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11032792 1645141 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical properties of Al/ω-Al-Cu-Fe composites synthesized by the SPS technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Mechanical properties of Al/ω-Al-Cu-Fe composites synthesized by the SPS technique
چکیده انگلیسی
Al/40 vol%ω-Al-Cu-Fe composites were produced from Al powder and i-Al-Cu-Fe quasi-crystalline particles using spark plasma sintering (SPS) technique. The mechanical properties of the composite were evaluated over the temperature range 293 K-823 K by performing compression tests at constant strain rate. The temperature dependence of the σ0,2% yield stress gives evidence of two temperature regimes with a transition in the range 473 K-523 K. The decrease of σ0,2% with increasing temperature, more pronounced in the low temperature regime, indicates that the two temperature regimes correspond to two different thermally activated deformation mechanisms. Based on microstructural analyses of the Al matrix, where plastic deformation takes place, the different strengthening contributions are discussed and the results are finally compared to those obtained for composites produced by hot isostatic pressing (HIP), for which the σ0,2% temperature dependence is similar. In the low temperature regime, the σ0.2% stress of the SPS composites is higher than that of the HIP composites. In this temperature regime, the stress difference is mainly ascribed to the different reinforcement phases present in the Al matrix. In the high temperature regime, the temperature dependence of σ0.2% is comparable for the two composites whatever the processing route: load transfer is thus the main strengthening mechanism, which is similar for the two Al/ω-Al-Cu-Fe composites, the temperature dependence being ascribed to cross slip and climb processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 145, November 2018, Pages 644-652
نویسندگان
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