کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
734649 893463 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of laser power density on the microstructure and microhardness of Ni–Al alloyed layer by pulsed laser irradiation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Effects of laser power density on the microstructure and microhardness of Ni–Al alloyed layer by pulsed laser irradiation
چکیده انگلیسی

Laser alloying of Ni–P electroless deposited layer with aluminum substrate was carried out by Nd–YAG pulsed laser. The phase composition and microstructure of the alloyed layers produced by different laser power densities were identified by X-ray diffractionary (XRD), scanning electron microscope (SEM) accompanied by energy dispersion X-ray analysis (EDS) and transmission electron microscope (TEM). Furthermore, the surface roughness of the alloyed layers was characterised by confocal laser scanning microscope (CLSM). The results showed that the characteristic dendritic or lamellar microstructures were observed in the alloyed layers. The phase constituents of the alloyed zones were intermetallic compounds of nickel–aluminum NiAl, Al3Ni and Al3Ni2, as well as some non-equilibrium phases and amorphous phases depending on the employed laser power density. As a result, the microhardness of the alloyed layer with Ni–P amorphous phases formed at laser power density 5.36×109 W/m2 reached to HV0.1 390.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 43, Issue 1, February 2011, Pages 138–142
نویسندگان
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