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  • 1
    Electronic Resource
    Electronic Resource
    Aging Behavior of Al-Cu Alloys Produced by Melt Extrusion Process (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 116-117 (Oct. 2006), p. 550-553 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Melt extrusion is a new fabrication process with the characteristics of both casting andextrusion. In this process, a metallic melt which is poured and solidified up to semisolid state in thecontainer can be directly extruded through the die exit to form a product of bar shape without otherintermediate processes. The aging behavior of Al-Cu alloys in the semisolid state was investigated.And the microstructure and mechanical properties of the melt extruded Al-Cu alloy bar weremeasured and its characteristics are compared with those of a hot extruded Al-Cu alloy bar. Al-Cualloys were successfully extruded after squeezing out of liquid during melt extrusion with smallerforce compared to the solid extrusion. Al-Cu alloys bar with the mean grain size of up to 200 μm wasfabricated by melt extrusion process. And the mechanical properties of the melt extruded Al-Cu alloybar were improved after the T6 treatment
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.550.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Microstructures and Mechanical Properties of Melt Extruded Al-Cu Alloys (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 116-117 (Oct. 2006), p. 635-638 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Melt extrusion is a new fabrication process with the characteristics of both casting andextrusion. In this process, a metallic melt which is poured and solidified up to semisolid state in thecontainer can be directly extruded through the die exit to form a product of bar shape without otherintermediate processes. The effects of various process parameters, such as melt temperature andextrusion ratio, on the extrusion behavior of Al-Cu alloys in the semisolid state were investigated.Mechanical properties of the melt extruded Al-Cu alloy were measured and its characteristics arecompared with the microstructure and copper contents in the alloy. Al-Cu alloys were successfullyextruded after squeezing out of liquid during the melt extrusion with smaller force (60 Mpa)compared to the solid extrusion. Al-Cu alloys bar with the mean grain size of 200 μm was fabricatedby melt extrusion; however, the mechanical properties have nothing to do with the extrusion ratio.The squeezing out of liquid was get lead to the segregation of the alloys and was affect on themechanical properties
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.635.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Anisotropy Control of Cold Rolled Cu-Ag Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 1047-1050 
    Details
    ISSN: 1662-8985
    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 anisotropy in mechanical strength and electrical conductivity in Cu-Ag alloy duringcold rolling were investigated. The anisotropy in tensile strength and electrical conductivity wassignificant with increasing Ag content in Cu-Ag alloy. The cold rolled Cu-Ag alloys with higher Agcontent have filamentary structure, which is composed of elongated eutectic phase and Cu matrix. Inaddition, the eutectic phase in Cu-Ag alloys with higher Ag content has a strong α-fiber texture. It canbe mentioned that the eutectic phase in filamentary structure is promotes the anisotropy of electricalconductivity of Cu-Ag alloys. This strong a-fiber texture of eutectic phase was decreased by annealingprocess (300 OC for 1h), and the anisotropy in strength and conductivity was decreased
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1047.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Ageing Behavior of Cu-Ag Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 1051-1054 
    Details
    ISSN: 1662-8985
    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: To develop Cu alloy with tensile strength of 800 MPa and electrical conductivity of80 %IACS (International Annealed Copper Standard), the variation of mechanical strength andelectrical conductivity in Cu-Ag alloy during fabrication processes including casting, solid solutionand ageing treatment were investigated. Solid solution hardening leads to a large drop in electricalconductivity of Cu-Ag alloys due to super-saturation of Ag solute in Cu matrix. Ageing hardeninggives rise to enhance both of the mechanical strength and the electrical conductivity. Therefore, it canbe mentioned that the electrical conductivity of Cu-Ag alloys was affected dominantly by Ag solute inCu matrix
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1051.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of Annealing Atmosphere on the Mechanical and Wear Properties of Free-Cutting Phosphor Bronze Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 461-464 
    Details
    ISSN: 1662-8985
    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 influence of annealing atmosphere on mechanical and wear properties of free-cuttingphosphor bronze alloy was investigated. After annealing in vacuum, the mechanical properties of thealloy decreases due to vaporization of alloying element. In addition, the softening of matrix inducesdecreasing the wear resistance dramatically. In contrast, high mechanical properties were observed inthe alloy annealed in air and in nitrogen atmosphere. In particular, a large smearing of lead in the alloyannealed in air atmosphere was observed and was affected on the enhancement of wear resistance.Consequently, annealing in vacuum atmosphere is not suitable for high mechanical properties andwear resistance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.461.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of ECAP Routes on the Microstructure and Mechanical Properties of Hot Extruded 3003 Al Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 124-126 (June 2007), p. 1397-1400 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The microstructures and mechanical properties of unidirectional deformation structured Alalloy during ECAP with various deformation routes were investigated. In order to fabricateunidirectional deformation structure for Al alloy, hot extrusion was carried out. It was found that thedeformation route A in ECAP routes is the dominant route for the grain refinement and strengthening.In deformation route A, the high strength ultra-fine grained Al alloy with a grain size of ~ 200 nm wasobtained due to the accumulation of consecutive strain process. In contrast, the strength of ECAP’edAl alloy produced via deformation route C was greatly increased after one pass because the grainswere strained and cancelled each pass. By contrast, the equiaxed grains were obtained in deformationroute BC because the sample was rotated 90 O in the same sense in each pass. The deformation routeBC was superior to the deformation route C because the deformation route BC was more favorablethan the deformation route C in the accumulation of consecutive strain. It is also found thatunidirectional deformation structured Al alloy via hot extrusion shows similar grain refinementtendency with equiaxed structured Al alloy during ECAP processing
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.1397.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Annealing on the Mechanical Property and Machinability of Free-Cutting Phosphor Bronze Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 544-545 (May 2007), p. 239-242 
    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: Free-cutting phosphor bronze alloy (ASTM C54400) was used as a material for automotiveparts and industrial valve parts for its high strength, machinability and excellent corrosion resistance.To obtain desired mechanical strength of the alloy, the process parameters including continuouscasting speed, reduction in area and annealing temperature have to be controlled. In this study, weinvestigated the effect of annealing on the mechanical property and machinability of free-cuttingphosphor bronze alloy fabricated by continuous casting with different casting speeds of 80, 100, and120 m/min, respectively. After annealing, the tensile strength of the alloy decreased with increasingannealing time owing to the occurrence of recrystallization and grain growth. In the cast and swagedalloy produced at casting speed of 120 m/min, the grain growth occurred rapidly. In contrast, in thealloy produced at the casting speed of 80 m/min, the grains growth rate was low. Furthermore, theeffect of Pb particle in the alloy on machinability was also investigated by using a tool dynamometerinstalled force sensor
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.239.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Modification of A3003 Alloy for Development of High Toughness Al Alloy Tube (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 615-618 
    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 strength of aluminum alloys was improved by a severe deformation process while thedecrease of elongation leads to the defect. Modification of A3003 alloy was attempted in order todevelop a high strength and high formability Al alloy tube for the application of air-conditioningsystems in transportation, such as passenger planes and automobiles. An A3003 alloy was modifiedby Ti addition, grain refiner. As a result of modification, the modified A3003 alloy was able tosuitably satisfy the mechanical strength requirements, including elongation. Grain size and secondarydendrite arm spacing of A3003 alloy decreased by as much as 50 % by Ti addition. The finer grainswere uniformly distributed in the modified A3003 alloy billet. The yield strength of the modifiedA3003 alloy was improved by 30 % without decreasing elongation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.615.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Development of A3003 Alloy Tube for Eco-Friendly Refrigerant Application (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 569 (Jan. 2008), p. 293-296 
    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 influence of extrusion temperature and Ti content was investigated by observing themicrostructure and determining the mechanical strength of A3003 alloy tube. The A3003 alloy wasmodified by inoculation in terms of addition of Ti and then extruded at the various extrusiontemperatures. In case of A3003 alloy tube without addition of Ti, the yield strength was slightlyimproved with decreasing extrusion temperature. On the other hand, the yield strength was improvedmarkedly in A3003 alloy tube with small addition of Ti, and also ductility was slightly reduced. Grainsize distribution from observing the microstructure was different with addition of Ti. Coarse grainswere formed on the outer and inner parts of the alloy tube without addition of Ti, whereas the finergrains were uniformly distributed in the alloy tube with addition of Ti. Thus the microstructure andmechanical strength of A3003 alloy tube could be controlled by addition of Ti. Threefore, optimum Ticontent and extrusion temperature to fabricate high yield strength and ductility A3003 alloy tube(σy=60 MPa, ε=30%) for eco-friendly refrigerant application are above 0.05wt.Ti and below 480 °C,respectively.Introduction
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.293.pdf
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  • 10
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    Asymmetric slip trace formation in tension/compression cyclic deformation of biomedical Co–Cr–Mo–N alloy with negative stacking fault energy (2014)
    Elsevier
    Details
    Publication Date: 2014-03-01
    Print ISSN: 1359-6462
    Electronic ISSN: 1872-8456
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Elsevier
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