Effect of Scanning Direction on Microstructure and Mechanical Properties of Part Formed via Variable Thickness Layer Cladding Deposition

2019 ◽  
Vol 46 (8) ◽  
pp. 0802003
Author(s):  
周显新 Xianxin Zhou ◽  
辛博 Bo Xin ◽  
巩亚东 Yadong Gong ◽  
张伟健 Weijian Zhang ◽  
张海权 Haiquan Zhang
Keyword(s):  
Mechanical Properties ◽  
Variable Thickness ◽  
Scanning Direction ◽  
Microstructure And Mechanical Properties ◽  
Thickness Layer

scholarly journals Effect of Cross Section Reduction on the Mechanical Properties of Aluminium Tubes Drawn With Variable Wall Thickness

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Q. H. Bui ◽  
R. Bihamta ◽  
M. Guillot ◽  
A. Rahem ◽  
M. Fafard
Keyword(s):  
Mechanical Properties ◽  
Cross Section ◽  
Variable Thickness ◽  
High Performance ◽  
Cold Drawing ◽  
Tensile Tests ◽  
Outer Diameter ◽  
Tube Drawing ◽  
Microstructure And Mechanical Properties ◽  
Variable Wall

Variable thickness tube drawing is a new process for the production of high performance tubes. In this study, experiments were conducted to evaluate the effect of cross section reduction on the microstructure and mechanical properties of variable thickness aluminium tubes drawn using two different position controlled mandrel techniques. Various tubes with three different outer diameters were subjected to cold drawing at room temperature from 11% to 41% cross section reduction. The local mechanical properties were determined from tensile tests carried out on specimens cut from different positions in the tubes parallel to their axes. The distributions of the Vickers hardness over the surfaces at 0 deg and 90 deg to the drawing direction were examined. It was found that the microhardness, yield strength, and ultimate tensile of the deformed samples increase and the corresponding elongation decreases with the increase of cross section reduction. Also, the anisotropy in microstructure and mechanical properties is more significant with increasing of cross section reduction. The evolution of mechanical properties of drawn tubes versus cross section reduction depends on the mandrel shapes and initial tube outer diameter. This study helps to further understand the microstructure and mechanical properties evolutions during tube drawing process with variable thickness.

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