The Paton Welding Journal, 2009, №01



2009 №01 (08)

2009 №01 (10)

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TPWJ, 2009, #1, 34-37 pages

EVALUATION OF MECHANICAL PROPERTIES OF MICROSTRUCTURAL CONSTITUENTS OF WELDED JOINTS

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 1, 2009 (January)
Pages                      34-37
 
 
Authors
A.Ya. ISHCHENKO and Yu.A. KHOKHLOVA
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Considered is the procedure for evaluation of mechanical properties of small-sized specimens based on determination of microhardness by the depth of penetration of Berkovich indenter in case of continuous indentation. Technical capabilities of this procedure have been assessed by evaluating the properties of γ-TiAl joints made by diffusion bonding. Statistical data on local distribution of microhardness were obtained, and values of Berkovich hardness, Young modulus and ductility coefficient of structural components within the zone of the diffusion bond have been determined.
 
 
Keywords: diffusion welding, γ-TiAl alloy, titanium aluminide, foil, welded joint, mechanical testing, Berkovich indenter, microhardness, Young modulus, ductility coefficient
 
 
Received:                04.04.08
Published:               28.01.09
 
 
References
1. Oliver, W.C., Pharr, G.M. (1992) An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res., 7, 1564-1570.
2. Glazov, V.M., Vigdorovich, V.N. (1969) Microhardness of metals and semiconductors. Moscow: Metallurgiya.
3. Grigorovich, V.K. (1976) Hardness and microhardness of metals. Moscow: Nauka.
4. Bulychev, S.I., Alyokhin, V.P. (1990) Testing of materials by continuous indentation of indentor. Moscow: Mashinostroenie.
5. Golovin, Yu.S., Tyurin, A.I., Ivolgin, V.I. et al. (2000) New principles, technique and results of investigation of dynamic characteristics of solids in microvolumes. Zhurnal Tekhn. Fiziki, 70, Issue 5, 82-83.
6. www/microstartech.com
7. NASA/TM-2002-211497: Surface characterization techniques. Glenn Res. Center.
8. Alyokhin, V.P. (1983) Physics of strength and plasticity of surface layers of materials. Moscow: Nauka.
9. Oliver, W.C., Pharr, G.M. (2004) Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology. J. Mater. Res., 9, 3-20.
10. Elistratov, N.G., Nosyrev, A.N., Khvesyuk, V.I. et al. The experimental ion-assisted deposition equipment for producing the multilayers materials: www:plasma-lab.ru//multilayers_r.html
11. www://vimi.ru/applphys/2001/2/f3-2/htm
12. Zaporozhets, V.V., Zakiev, I.M., Nikitin, Yu.A. Device for macrohardness testing of materials. USSR author's cert. 373581. Int. Cl. G 01 N 3/42. Publ. 07.02.93.

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