Static and Dynamic Loading Behavior of Ti6Al4V Honeycomb Structures Manufactured by Laser Engineered Net Shaping (LENSTM) Technology

被引:53
作者
Antolak-Dudka, Anna [1 ]
Platek, Pawel [2 ]
Durejko, Tomasz [1 ]
Baranowski, Pawel [3 ]
Malachowski, Jerzy [3 ]
Sarzynski, Marcin [2 ]
Czujko, Tomasz [1 ]
机构
[1] Mil Univ Technol, Dept Adv Mat & Technol, Urbanowicza 2, PL-00908 Warsaw, Poland
[2] Mil Univ Technol, Inst Armament Technol, Urbanowicza 2, PL-00908 Warsaw, Poland
[3] Mil Univ Technol, Dept Mech & Appl Comp Sci, Urbanowicza 2, PL-00908 Warsaw, Poland
关键词
honeycomb structure; additive manufacturing; laser engineered net shaping; LENS; Ti6Al4V alloy; energy absorption; dynamic tests; HEAT-TREATMENT; HIERARCHICAL HONEYCOMBS; ALLOY; MICROSTRUCTURE; RESISTANCE; SCAFFOLDS;
D O I
10.3390/ma12081225
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Laser Engineered Net Shaping (LENSTM) is currently a promising and developing technique. It allows for shortening the time between the design stage and the manufacturing process. LENS is an alternative to classic metal manufacturing methods, such as casting and plastic working. Moreover, it enables the production of finished spatial structures using different types of metallic powders as starting materials. Using this technology, thin-walled honeycomb structures with four different cell sizes were obtained. The technological parameters of the manufacturing process were selected experimentally, and the initial powder was a spherical Ti6Al4V powder with a particle size of 45-105 mu m. The dimensions of the specimens were approximately 40 x 40 x 10 mm, and the wall thickness was approximately 0.7 mm. The geometrical quality and the surface roughness of the manufactured structures were investigated. Due to the high cooling rates occurring during the LENS process, the microstructure for this alloy consists only of the martensitic ' phase. In order to increase the mechanical parameters, it was necessary to apply post processing heat treatment leading to the creation of a two-phase + structure. The main aim of this investigation was to study the energy absorption of additively manufactured regular cellular structures with a honeycomb topology under static and dynamic loading conditions.
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页数:20
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