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  • 2005-2009  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Investigation of Crystallization in an Amorphous Cu-Based Alloy by X-Ray (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 589 (June 2008), p. 131-136 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Recently one of the most significant research-field in the development of amorphousalloys is the research of the Cu-based amorphous alloys. The Zr-based alloys developed earlier canbe replaced by the newly developed Cu-based alloys as the high price of the Zr-based alloys limitstheir utilization in spite of their favourable properties. Production of Cu-based alloys having thesame or more favourite properties than Zr-based alloys is cheaper and this fact can promote theirincreasing utilization. Cu-Zr-Ti and Cu-Hf-Ti alloy systems – they are Cu-based alloys – haveexcellent mechanical properties. In this paper investigations of crystallization of amorphousCu44,25Zr36Ag14,75Ti5 powder produced by ball milling (these processes have not been investigatedyet according to the reference data) are described. In the course of investigation of thecrystallization process, samples were heated to a temperature of investigation by means of a DSCequipment and the developed state was frozen by chilling. The investigation of the developedstructure and to identify the phases formed during heat treatment, X-ray diffraction method wasused
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.589.131.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Developing Mechanical Properties and Electrical Conductivity of Cu Alloys by Jominy End-Quench Test (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 537-538 (Feb. 2007), p. 55-62 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Copper alloys have many properties, which make them suitable in wide-rangingapplications in all the engineering industries. For the investigated alloys the most importantproperties are hardness, strength and electrical conductivity. Precipitation hardenable alloys werestudied by Jominy end-quench test, in order to examine the change of hardness, electricalconductivity and microstructure as a length of the test bar (i.e. cooling rate). In the first step sampleswere solution treated at different temperatures, then water quenched followed by aging. Cold-workafter quench was applied in some alloys and improve in the properties was clearly seen. Thefollowing Cu-alloys were investigated: Cu-Co-Ni-Be, Cu-2Be-Ni and Cu-2Ni-Be
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.537-538.55.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Investigation of Ageing Phenomena in CuAlNi Based Shape Memory Alloys (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 537-538 (Feb. 2007), p. 129-136 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The ageing phenomena and its effect on the thermoelastic martensitictransformation was investigated in three Cu-base SMAs. The transformation temperaturesshifted to higher temperatures due to aging in the beta-phase.To increase the alloy’s ductility, a definite amount of Mn (4 wt%) and Fe (2 wt%) were addedto the ternary alloy. The thermoelastic martensitic transformation was found in the not-agedsamples of the CuAlNiMn and CuAlNiMnFe alloys. This transformation was destroyed dueto ageing heat treatments by a fairly unknown exothermic process. The thermoelasticmartensitic transformation appeared again in the aged CuAlNiMn and CuAlNiMnFe samplesafter keeping them on room temperature for a few months.This phenomena was investigated by DSC, SEM, TEM, and XRD
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.537-538.129.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation of Thermomechanical Treated Austenitic Stainless Steel (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 473-474 (Jan. 2005), p. 237-242 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: During thermomechanical treatment of austenitic stainless steel a’ martensite and emartensite form in the austenite matrix. The martensitic transformation and deforming existing together result a high elongation at the investigated steel belonging to the TRIP grades. The amount of a’and e martensite depends on the strain level as well as on the deforming temperature in this steel. In the course of thermomechanical treatments we measured the amount and texture of the existing phases at different temperature and strain. It has been stated that the martensites are dominant in low temperature range, they have a considerable amount, and the transformation from emartensite to a’ martensite also takes place. The amount of a’ martensite increases by increasing the strain while the amount of e martensite shows a maximum. By investigating the relationship between the quantity of existing phases and the effect of texture, it has been stated that the transformation takes place in certain given plates in the textured matrix
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.473-474.237.pdf
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    Paper (German National Licenses)
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