کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5017653 1466716 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental analysis of spatter generation and melt-pool behavior during the powder bed laser beam melting process
ترجمه فارسی عنوان
تجزیه و تحلیل تجربی از تولید پراکنده و رفتار ذوب استیل در فرآیند ذوب لیزر پودر بستر پودر
کلمات کلیدی
لیزر، تخت پودر، تولید افزودنی، اسپادتر، کلید سوراخ،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی

The experimental analysis of spatter formation was carried out on an instrumented SLM set-up allowing the quantification of spatter ejections and possible correlation with melt-pool behavior. Considering nearly similar SLM conditions than those carried out on SLM machines, an increase of large spatters (>80 μm) with volume energy density (VED) was clearly demonstrated on a 316L stainless steel, which was attributed to the recoil pressure applied on the melt-pool by the metal vaporization and the resulting high velocity vapor plume. In a second step, much lower spattering was shown on Al-12Si powder beds than on 316L ones. Fast camera analysis of powder beds indicated that droplet formation was mostly initiated in the powder-bed near the melt-pool interface. On Al-12 Si alloys, such droplets were directly incorporated in the MP without being ejected upwards as spatters like on 316L. Last, it was shown that a strong reduction of spattering was possible even on 316L, with the use of low VED combined with larger spots (≈0.5 mm), allowing to melt sufficiently deep layers in conduction regime and ensure adequate dilution between layers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 251, January 2018, Pages 376-386
نویسندگان
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