Microstructure, thermal physical property and surface morphology of W-Cu composite fabricated via selective laser melting

Purpose The purpose of this paper is to investigate the track evolution and surface characteristics of selective laser melting Ti6Al4V. Design/methodology/approach In the present paper, Ti6Al4V single-track, multi-track and bulk sample were formed at different scanning speed by selective laser melting (SLM). Then, the surface morphology, three-dimension profile and surface roughness were evaluated. The width of the single and multi-track was measured and compared. Findings The results showed that the heat accumulation played a great role on the evolution of tracks and surface characteristics from single-track to multi-track and to bulk. The surface morphology of the subsequent tracks became more regular when the single-track was irregular at the same high scanning speed. The width of last track Wn was always larger than that of the first track W1. The Ra of the top of the bulk increased with the increase of the scanning speed, this trend was as same as the Ra of the single-track, but the trend of Ra of the side was opposite. Originality/value The effect of heat accumulation on the track evolution and surface characteristics is obtained. The results can help to derive a smooth surface with a regular and continuous track in SLM.

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Influence of selective laser melting scanning speed parameter on the surface morphology, surface roughness, and micropores for manufactured Ti6Al4V parts

Journal of Materials Research ◽

10.1557/jmr.2020.84 ◽

2020 ◽

Vol 35 (15) ◽

pp. 2025-2035

Author(s):

Mohd Faizal Sadali ◽

Mohamad Zaki Hassan ◽

Fauzan Ahmad ◽

Hafizal Yahaya ◽

Zainudin A Rasid

Keyword(s):

Surface Roughness ◽

Surface Morphology ◽

Selective Laser Melting ◽

Scanning Speed ◽

Laser Melting ◽

Speed Parameter ◽

Image Position

Abstract

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A research on the surface morphology, microstructure evolution and wear property of selective laser melting Al2O3/P20 composites

Materials Research Express ◽

10.1088/2053-1591/ab691e ◽

2020 ◽

Vol 6 (12) ◽

pp. 1265h3

Author(s):

Zhixiong Lin ◽

Xiaoxun Zhang ◽

Fang Ma ◽

Chuanbo Chen ◽

Sensen Dong ◽

...

Keyword(s):

Surface Morphology ◽

Selective Laser Melting ◽

Microstructure Evolution ◽

Wear Property ◽

Laser Melting

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The influence of laser processing parameters on the densification and surface morphology of pure Fe and Fe-35Mn scaffolds produced by selective laser melting

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2019.03.018 ◽

2019 ◽

Vol 40 ◽

pp. 113-121 ◽

Cited By ~ 11

Author(s):

D. Carluccio ◽

A.G. Demir ◽

L. Caprio ◽

B. Previtali ◽

M.J. Bermingham ◽

...

Keyword(s):

Surface Morphology ◽

Selective Laser Melting ◽

Laser Processing ◽

Processing Parameters ◽

Laser Melting

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Selective Laser Melting of Multi-Component Ni-Based Powder Mixture for Building Metallic Parts

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.723 ◽

2011 ◽

Vol 675-677 ◽

pp. 723-726

Author(s):

Rui Di Li ◽

Yu Sheng Shi ◽

Zhi Gang Wang ◽

Jin Hui Liu

Keyword(s):

Surface Morphology ◽

Selective Laser Melting ◽

Phase Structure ◽

Composite Powder ◽

Laser Energy ◽

Surface Condition ◽

Xrd Analysis ◽

Sem Analysis ◽

Laser Melting ◽

Metallic Parts

Selective laser melting (SLM) is an advanced manufacturing technology, which is flexible in building three-dimensional (3D) metallic parts. In this work, SLM experiment of a multicomponent Ni-based composite powder, which consisted of Ni, Cr, Fe, and Al powders, was conducted with favorable forming ability. The SEM, EDX, and XRD analysis were used to characterize the surface morphology, microstructure, and phase structure of as-formed Ni-based alloy. The XRD analysis showed that the as-received phase structure was Ni based solid solution. The SEM analysis of surface morphology revealed that metal agglomerates or balls were very easily formed in SLM surface, between which some pore channels existed. The surface condition and porosity could be improved by increasing laser energy input, because of a higher molten temperature and accordingly better flowing and flatting characteristics. The SEM analysis of microstructure showed that the crystalline grains were in cellular and columnar shape. Moreover, the grains were very fine with average dimensions about 5μm, due to the rapid cooling rate with rapid laser beam moving. The EDX analysis illustrated that the element contents of starting powder were uniformly distributed in as-prepared sample. A case investigation into SLM of this composite powder to form an impeller was also performed.

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