Advanced Engineering Materials

Cover image for Vol. 8 Issue 3

Special Issue: Filler Metals, Solders and Joints of the next Generation

March, 2006

Volume 8, Issue 3

Pages 135–221

    1. Cover Picture: Residual Stresses, Thermomechanical Behavior and Interfaces in the Weld Joint of Ni-based Superalloys (Adv. Eng. Mater. 3/2006)

      O. M. Barabash, R. I. Barabash, S. A. David and G. E. Ice

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200690003

      The paper relates aspects of interfaces, residual stresses and dislocations with joint behaviour in the Ni–based single crystals. It is focused on the understanding the fundamental driving forces and response of the materials which leads to the formation of dislocation structure during local melting and solidification. Oscillations in the dislocation structure are observed at both macro and micro scales. The underlying mechanism of these processes is essential to real world applications.

    2. Contents: Adv. Eng. Mater. 3/2006 (pages 137–140)

      Version of Record online: 8 MAR 2006 | DOI: 10.1002/adem.200690004

    3. Performant Clay/Carbon Nanotube Polymer Nanocomposites (pages 147–154)

      Ph. Dubois and M. Alexandre

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500256

      Recent developments in syntheses, properties and (future) applications of polymer-based nanocomposites filled with either organoclays and/or carbon nanotubes are presented. In situ polymerization/grafting process as catalyzed directly from the nanofiller (organoclay or carbon nanotube) surface proved to be highly efficient, allowing for the complete destructuration of the native filler and the preparation of masterbatches that permit to reach a very homogeneous dispersion of the individual nanoparticles in commercial polymer matrices.

    4. Tensile Strengths of Metal-Containing Joints Fabricated by Focused Electron Beam Induced Deposition (pages 155–157)

      I. Utke, V. Friedli, S. Fahlbusch, S. Hoffmann, P. Hoffmann and J. Michler

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500254

      The tensile strength of joints fabricated by focused electron beam (FEB) induced deposition is studied with a cantilever-based set-up in a scanning electron microscope (SEM). Two positioning tables allow for contacting a freestanding deposit with the cantilever. A metal/carbon nano-composite joint is formed by scanning the contact area with the FEB decomposing the precursor molecules W(CO)6 and Co2(CO)8. The tensile strength can be measured by retracting the cantilever until deposit rupture.

    5. The Potential of Vacuum Brazing – State of the Art and Developments from the Perspective of a Service Contractor (pages 158–161)

      M. Boretius

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500247

      Vacuum brazing is widely used to join sophisticated components for a broad range of industrial applications. Combining different materials by brazing offers new opportunities to design engineers to improve existing or to create new functions.

    6. Evaluation of Lead Free Soldering Development by Means of a Holistic Consideration (pages 161–164)

      M. Türpe

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500262

      Engineering is still mainly oriented towards step-by-step-processes. Due to ongoing challenges such as increasing complexity or shortened time for product developments, connections and correlations have to be understood and used as an important part of work in engineering practice as well as in research. Therefore, a tool derived form a holistic model based on a material approach is explained. The subject of lead-free electronic soldering is taken for illustrating its practical use and potential.

    7. The Experimental and Theoretical Study of Phase Equilibria in the Pd–Zn (-Sn) System (pages 164–176)

      J. Vizdal, A. Kroupa, J. Popovic and A. Zemanova

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500248

      The binary Pd-Zn system was assessed in the scope of this paper. The experimental data from the literature were used for the assessment, together with our own data obtained by SEM-EDS analysis and by the DTA. The paper is focused particularly on the Pd-Zn system, but the Pd-Sn and Sn-Zn systems are also analysed in this paper. Finally, first prediction of the isothermal sections of the ternary Pd-Sn-Zn system was made.

    8. The Effect of Intermetallic Compound on Shear Strength of Diffusion Soldered Interconnection (pages 176–179)

      J. Wojewoda, B. Onderka and P. Zieba

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500255

      The mechanical properties of diffusion soldered Cu/Cu interconnections were examined. Application of the indium-tin eutectic alloy as a solder material and different manufacturing temperatures resulted in creation of the intermetallics in the interconnection area. The calculated cross-sections of the Cu-In-Sn diagram combined with Scanning Electron Microscopy investigation allowed for the detailed description of the joints before the shear test and after it.

    9. Local Fatigue in Lead-Free SnAg3.8Cu0.7 Solder (pages 179–183)

      P. P. Jud, G. Grossmann, U. Sennhauser and P. J. Uggowitzer

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500244

      It has been shown that in thin SnAg3.8Cu0.7 solder samples, strain concentration in shear bands is the dominant mechanism of fatigue damage. The development of degradation results from the interplay of lattice defect accumulation and recrystallization. Localized recrystallization is assumed to enhance the lifetime of the samples. Line patterns superimposed by FIB are useful in tracking the deformation and in localizing slip planes in the solder.

    10. Size and Constraining Effects in Lead-Free Solder Joints (pages 184–191)

      J. Cugnoni, J. Botsis and J. Janczak-Rusch

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200400236

      A novel in-situ characterization technique combining Digital Image Correlation strain measurement and inverse numerical identification was developed to determine the plastic constitutive properties of Sn-Ag-Cu lead-free soldering material inside real joints. The effects of size and geometrical constraints on the constitutive and apparent stress-strain response of 0.1, 0.5 and 1mm joints were studied, showing clearly the important constraining and size effects in thin solder joints.

    11. Comparison of Three Different Active Filler Metals Used for Brazing Ceramic-to-Ceramic and Ceramic-to-Metal (pages 191–196)

      V. Bissig, M. Galli and J. Janczak-Rusch

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500234

      Three active filler metals were studied to determine their suitability for joining Si3N4-TiN composite ceramics. The evolution of the bend strength in the different setups could be explained using microstructural analysis, micro-hardness measurement and finite element modelling. It was observed that residual stresses in ceramic-to-metal joints can be decreased more effective with plastic deformation than by reducing the brazing temperature.

    12. Relief of the Residual Stresses in Ceramic-Metal Joints by a Layered Braze Structure (pages 197–201)

      M. Galli, J. Botsis and J. Janczak-Rusch

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500233

      The potential of active brazing filler metal modification by ceramic particle addition, with the aim of reducing the stresses in ceramic-metal joints is studied. A layered braze structure is proposed: layers of reinforced and un-reinforced filler are combined in an optimal manner to minimize residual stress. The joints are tested in 4-point bend tests. The evaluation of residual stresses and the optimization of the braze layout are carried out by FE modelling.

    13. Residual Stresses, Thermomechanical Behavior and Interfaces in the Weld Joint of Ni-based Superalloys (pages 202–205)

      O. M. Barabash, R. I. Barabash, S. A. David and G. E. Ice

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500239

      The paper relates aspects of interfaces, residual stresses and dislocations with joint behaviour in the Ni–based single crystals. It is focused on the understanding the fundamental driving forces and response of the materials which leads to the formation of dislocation structure during local melting and solidification. Oscillations in the dislocation structure are observed at both macro and micro scales. The underlying mechanism of these processes is essential to real world applications.

    14. Tensile Deformation Behaviour of the Titanium Alloy with Hard Elastic Coating (pages 205–208)

      W. Ziaja and J. Sieniawski

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500242

      Various surface engineering techniques are used to modify the surface layer of the Ti alloys to improve their tribological properties. The life of the coating can be increased by introducing intermediate hardened surface layer reducing plastic deformation of substrate material. In this paper, the tensile behaviour of Ti alloy with hard elastic coating was investigated to enable tailoring the resistance to plastic deformation and increase load bearing capacity and fatigue resistance.

    15. Relationship between Condition of Deposition and Properties of W-Ti-N Thin Films Prepared by Reactive Magnetron Sputtering (pages 209–212)

      A. V. Kuchuk, V. P. Kladko, O. S. Lytvyn, A. Piotrowska, R. A. Minikayev and R. Ratajczak

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200500263

      A correlation between the film properties of nitrides, oxides etc., and their structure, is of fundamental importance – not only for thin solid films physics but also for practical applications. The structure of the films depends on deposition methods and their parameters. The relationship between properties (chemical and phase compositions, surface morphology, and electrical resistivity) and nitrogen partial pressure of reactive magnetron sputtered W-Ti-N thin films has been discussed here in detail.

    16. Mechanical Properties and Processing of Low-Temperature Diffusion-Welded Hybrid Joints (pages 212–218)

      J. Wilden, J. P. Bergmann and S. Jahn

      Version of Record online: 7 MAR 2006 | DOI: 10.1002/adem.200600006

      Diffusion welding represents an attractive joining technology. This paper deals with joining Al to Ti. Initial investigations were performed on Al99.5 and cp-Ti in order to understand the diffusion process for technically pure materials. In further investigations AA5xxx and AA6xxx were joined with cp-Ti in order to show the effect of alloying elements. The results concerning the mechanical behaviour of joints confirm the suitability of the process for high-strength applications.

    17. You have free access to this content
      Annual Author Index 2005 (pages 219–221)

      Version of Record online: 8 MAR 2006 | DOI: 10.1002/adem.200690005

      This article corrects:

      Author Index Adv. Eng. Mater. 2005

      Vol. 7, Issue 12, 1163–1165, Version of Record online: 19 JAN 2006

SEARCH

SEARCH BY CITATION