共 43 条
Effect of anisotropy in the build direction and laser-scanning conditions on characterization of short-glass-fiber-reinforced PBT for laser sintering
被引:26
作者:
Arai, S.
[1
]
Tsunoda, S.
[1
]
Yamaguchi, A.
[1
]
Ougizawa, T.
[2
]
机构:
[1] Hitachi Ltd, Res & Dev Grp, 292 Yoshida, Yokohama, Kanagawa 2440817, Japan
[2] Tokyo Inst Technol, Sch Mat & Chem Technol, Meguro Ku, 2-12-1-S8-33 Ookayama, Tokyo 1528552, Japan
关键词:
Selective laser sintering;
Poly(butylene terephthalate);
Short glass fiber;
Fiber orientation;
Laser-scan process;
Porosity;
MECHANICAL-PROPERTIES;
FATIGUE PROPERTIES;
TENSILE-STRENGTH;
POLYAMIDE;
BEHAVIOR;
ORIENTATION;
TEMPERATURE;
PARAMETERS;
MICROSTRUCTURE;
CRYSTALLINE;
D O I:
10.1016/j.optlastec.2019.01.012
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
Copolymer poly(butylene terephthalate) with 30- wt% short glass fiber (SGF) added was used to evaluate the dependence of the properties of specimens manufactured by selective laser sintering (SLS) and the influence of laser-irradiation conditions on build direction. The degree of orientation of SGFs in SLS is ranked in descending order of roller-movement direction, vertical direction in the powder-bed plane, and direction of lamination-layer thickness. Moreover, the influence of fiber orientation on mechanical properties, thermal properties, and shrinkage ratio was found to be remarkable. In the case of the double-scan method, in comparison to the single-scan case, while thermal degradation was suppressed, porosity was reduced, and mechanical properties were improved. In addition, degree of crystallinity of the SLS specimens increased, and heat-deflection temperature increased slightly. Furthermore, in regard to roller-movement direction and lamination-layer thickness direction, the trends of shrinkage ratio differ in the cases of the single- and double-scan scanning methods.
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页码:345 / 356
页数:12
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