Star trek materials today?

Partridge, P. G.; Griffith, P.W.; Ward‐Close, C.M.

doi:10.1007/bf02914697

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…In contrast to conventional welding techniques, where one or both joint partners partially melt, diffusion welding, co‐extrusion and compound rolling produce an adhesive bonding under compression at elevated temperatures utilizing diffusion . Due to mechanical deformation during processing compound rolling leads to an extension of contact surfaces promoting bonding mechanism like mechanical clamping and adhesion.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the interface of co‐extruded asymmetric aluminum‐titanium composite profiles

Grittner

Striewe

Hehl

et al. 2014

Materialwissenschaft Werkst

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The combination of different light alloys enables lightweight solutions with tailor‐made properties at the macroscopic global as well as at the microscopic scale. In this context co‐extrusion by a lateral angular co‐extrusion (LACE) process offers a great potential for advanced profiled structures. While titanium alloys show particular high mechanical strength and good corrosion resistance, aluminium alloys provide a considerable high specific bending stiffness along with low materials costs. The mechanical properties of metallic compounds strongly depend on the bonding mechanisms, which are initiated during processing. In order to enable a rigid adhesive bond between Al and Ti in this study the extrusions were processed by means of a newly developed lateral angular co‐extrusion that is a modified equal channel angular pressing process (ECAP). Latter is known for promoting diffusion bonding by reducing the activation energy. Hence, the study is focused on the general manufacturing of Al–Ti‐compounds by lateral angular co‐extrusion. The second aim of the study was to investigate the development of the bonding zone during processing. Experiments were made with the material combination Al99.5 and titanium grade 2. The bonding zones of the co‐extruded samples were analyzed by scanning electron microscopy and energy dispersive X‐ray analysis. The bond strength was determined by quasi‐static tensile tests. Compared to the as‐extruded condition an intermetallic layer was formed during heat treatment. The layer was characterized by scanning electron microscopy and electron probe micro analysis.

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Section: Introductionmentioning

confidence: 99%

Characterization of the interface of co‐extruded asymmetric aluminum‐titanium composite profiles

Grittner

Striewe

Hehl

et al. 2014

Materialwissenschaft Werkst

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“…Magnesium has high thermal conductivity, high coefficient of linear expansion, low melting point and other characteristics, so it is easy to form air holes or cracks during welding. Diffusion bonding is an attractive joining technique for many advanced materials [6]. Diffusion bonding is a solid state joining technique and has widely used in titanium alloys, aluminum alloys, steels, and iron aluminides [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Study on Vacuum Diffusion Bonding of as-Extruded AZ31 Magnesium Alloy

Lin

Sun

et al. 2011

AMM

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In this investigation a study on vacuum diffusion bonding of as-extruded AZ31 magnesium alloys was carried out according to atomic diffusion theory. The bonding quality of the joints was checked by microstructure analysis, shear test and micro-hardness testing. The results showed that the diffusion temperature and holding time had a great effect on the the bonding quality of the joints. The maximum of joint shear strength was 76.2MPa with the bonding temperature being 420°C and the holding time reaching 90min.

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“…Dem gegenüber findet beim Diffusionsschweißen kein Aufschmelzen des Werkstoffes statt. Die stoffschlüssige Verbindung wird über Druck, Temperatur und damit einhergehende Diffusionsvorgänge hergestellt [7,8].…”

Section: Introductionunclassified

Verbundstrangpressen von Titan‐Aluminium‐Verbindungen

Grittner

Haverkamp²,

Stelling

et al. 2009

Materialwissenschaft Werkst

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The combination of different metals enables the processing of materials with local optimized properties. Thus, the production of metallic composites is associated with high standards in manufacturing technologie. Focus of the following investigations is the rod extrusion process of titanium-aluminum-composites. Besides the mechanical properties, the formation of the bonding zone and the mechanisms of adhesion in the bonding zone were investigated. The influence of specimens' preparation and of different coatings used improve bonding were a matter of particular interest. Whereas coatings of copper or nickel inhibit the formation of a strong bonding due to the formation of oxide layers, sealed titanium cores can reach a mechanical strength of up to 100 MPa after rod extrusion. Compared to other joining technologies, an impairment of the base metal via formation of heat affected zones, pores or grain coarsening does not occur.

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Star trek materials today?

Cited by 4 publications

References 3 publications

Characterization of the interface of co‐extruded asymmetric aluminum‐titanium composite profiles

Characterization of the interface of co‐extruded asymmetric aluminum‐titanium composite profiles

A Study on Vacuum Diffusion Bonding of as-Extruded AZ31 Magnesium Alloy

Verbundstrangpressen von Titan‐Aluminium‐Verbindungen

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