Investigation for the Fracture Process of WCp/Cu Functionally Graded Materials under Three-Point-Bending

2013 ◽  
Vol 683 ◽  
pp. 17-20
Author(s):  
Hai Ting Xia ◽  
Rong Xin Guo ◽  
Feng Yan ◽  
Hai Yu ◽  
Yu Bo Zhang
Keyword(s):  
Powder Metallurgy ◽  
Functionally Graded Materials ◽  
Fracture Process ◽  
Bottom Layer ◽  
Functionally Graded ◽  
Graded Materials ◽  
Bending Tests ◽  
Bending Performance ◽  
Three Point Bending ◽  
Graded Layers

In this paper, the fracture process of WCp/Cu functionally graded materials(FGMs) was investigated. The used materials were fabricated by powder metallurgy using tungsten carbide(WC) particles and copper(Cu) matrix, and had functionally graded layers. In order to investigate the fracture process of the FGM, three-point-bending tests of rectangular specimens were carried out. From the results, it can be seen that the bending performance of FGM structures with increasing WC content from head layer to the bottom layer excels that of FGM structures with decreasing WC content in three-point-bending tests.

scholarly journals MULTILAYER COATINGS Ti/TiN, Cr/CrN AND W/WN DEPOSITED BY MAGNETRON SPUTTERING FOR IMPROVEMENT OF ADHESION TO BASE MATERIALS

2015 ◽  
Vol 55 (6) ◽  
pp. 388 ◽  
Author(s):  
Jakub Horník ◽  
Stanislav Krum ◽  
David Tondl ◽  
Maxim Puchnin ◽  
Pavel Sachr ◽  
...  
Keyword(s):  
Functionally Graded Materials ◽  
Scratch Test ◽  
Functionally Graded ◽  
Point Of View ◽  
Multilayer Coatings ◽  
Graded Materials ◽  
Protective Function ◽  
Base Materials ◽  
Graded Layers ◽  
Graded Material

The paper deals with evaluation of single and multilayer layer PVD coatings based on Cr and Ti widely used in tool application. Additionally, W and WN based coating which are not so widespread were designed and deposited as functionally graded material. The coatings properties were evaluated from the point of view of hardness and adhesion. The hardness measuring was carried out using nanoindentation method. The scratch test was performed to test adhesion. Moreover, the presence of metallic interlayer in functionally graded materials further increases the coating adhesion by gradually approaching its composition to the substrate. Coatings consisting of W and WN have showed very good adhesion. With regard to the results of the scratch test, the multilayer coatings of CrN, TiN and WN have increased adhesion and can be assumed to have their protective function improved. Results will be appliedin development of functionally graded layers for functionally graded materials.

Tungsten/Copper Functionally Graded Materials: Possible Applications and Processing through the Powder Metallurgy Route

2007 ◽  
Vol 534-536 ◽  
pp. 1569-1572 ◽  
Author(s):  
O. Ozer ◽  
J.M. Missiaen ◽  
Celine Pascal ◽  
Sabine Lay ◽  
Jean Marc Chaix ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Composition Gradient ◽  
Graded Materials ◽  
Layer Material ◽  
Cu Migration ◽  
Sintering Behaviour ◽  
Powder Metallurgy Route

Processing of W-Cu graded materials from attritor-milled W-CuO mixtures is described. The powder reduction steps are investigated by TG and XRD analyses and by microstructural observations (SEM, TEM). Sintering of reduced powder with different compositions is analysed by dilatometry. Sintering behaviour of the graded component processed by co-compaction of a 10/20/30wt%Cu multi-layer material is briefly discussed. Liquid Cu migration is observed and smoothes the composition gradient. Perspectives to control this migration are discussed.

scholarly journals Manufacturing and Mechanical Behavior of (Al/SiC) Functionally Graded Material using Powder Metallurgy Technique

2019 ◽  
Vol 8 (9) ◽  
pp. 1835-1839 ◽  
Keyword(s):  
Powder Metallurgy ◽  
Functionally Graded Materials ◽  
Pure Aluminum ◽  
Weight Ratio ◽  
Mesh Size ◽  
High Hardness ◽  
High Strength ◽  
Functionally Graded ◽  
Graded Materials ◽  
Wide Range

This research focuses on manufacturing and mechanical characterization of functionally graded materials using powder metallurgy techniques. Owing to its low density and high strength to weight ratio, pure aluminum with mesh size No. 200 is chosen as the matrix. Silicon carbide with mesh size No. 220, which has a wide range of applications due to its high hardness, is selected as reinforcement. Specimens of two functionally graded materials(FGM) with 4 layers (0%, 3%, 7%, 10%)(FGM-1) and 5 layers (10%, 20%, 30%, 40%, 50%) (FGM-2) are sintered by varying the SiC composition from layer to layer. From the microstructure, it is clearly evident that four layered specimens achieved more homogeneous mixture than five layered. Also, mechanical properties of four layered specimens attained better results than five layered specimens.

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