کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8023234 | 1517531 | 2018 | 41 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural and tribological investigations of diecast and hard anodized AlSiCu alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructural and tribological investigations of diecast and hard anodized AlSiCu alloys Microstructural and tribological investigations of diecast and hard anodized AlSiCu alloys](/preview/png/8023234.png)
چکیده انگلیسی
The thickness and morphology of the anodic layer were investigated using optical and electron microscopy, whereas the tribological properties were evaluated using a reciprocating sliding testing machine under ball-on-flat configuration. The removal of both external eutectic Si segregation and oxide passivating layer due to milling operation is beneficial to increase the thickness of the anodic film, independently of the investigated alloy. However, this leads to a decrease of the abrasion resistance due to the presence of coarser Si particles. Sandblasting removes lower amounts of material and its effect on the anodizing response is more affected by the initial chemical composition of the alloy. The thickness of the oxide layer over the as-diecast surfaces increases by increasing the eutectic fraction and decreasing the Cu content. The greater the amount of α-Al phase in the surface microstructure, the thicker the anodic layer will be. Fine and globular eutectic Si particles lead to a thicker hard anodic layer respect to coarser and plate-like ones. The anodizing response seems in any case to be more related to the amount of α-Al matrix than the shape of Si particles. Higher eutectic fraction with globular eutectic Si particles is useful to increase the tribological properties of the anodic film. Lower eutectic amounts lead to increase the thickness of the anodic film but also to decrease the abrasion resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 352, 25 October 2018, Pages 462-473
Journal: Surface and Coatings Technology - Volume 352, 25 October 2018, Pages 462-473
نویسندگان
Daniele Caliari, Giulio Timelli, Borja Zabala, Amaya Igartua,