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  • 1
    Electronic Resource
    Electronic Resource
    Experimental Study on High Speed Milling of γ-TiAl Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 6-10 
    Details
    ISSN: 1013-9826
    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: This paper deals with the milling machinability of gamma titanium aluminide at speedsof 60-240m/min. The results showed that surface roughness was less than Ra0.44μm at all cuttingspeeds used in the tests even when the tool wear reached VB0.2mm. The milling forces increasedslightly with increasing cutting speed but increased rapidly with the elevated flank wear valueespecially for the Fy component. Compared to those of titanium alloy TA15, the milling forces ofγ-TiAl were 190%, 180% and 200% greater for Fx, Fy and Fz respectively under the samemachining conditions. Workpiece surface has a maximum microhardness of approximately600HV0.100, and the depth of maximum hardened layer was confined to 180μm below the surface.When cut with TiAlN coated carbide tool, tool life was 35 min which was only about 1/2 of that fortitanium alloy TA15
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.6.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Machining Induced Defects and the Influence Factors when Diamond Turning of SiC〈sub〉p〈/sub〉/Al Composites (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 10-12 (Dec. 2007), p. 626-630 
    Details
    ISSN: 1662-7482
    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: Ultra-precision turning tests on SiCp/2024Al and SiCp/ZL101A composites were carriedout to investigate the surface quality using single point diamond tools (SPDT) and polycrystallinediamond (PCD) cutters. Examined by SEM, the machined surfaces took on many defects such aspits, voids, microcracks, grooves, protuberances, matrix tearing and so on. The results showed thatsurface quality debased with increasing feed rate or using of high volume fraction materials. Drycutting would deteriorate the surface finish. It was also pointed out that SPDT outperformed PCDtools although they produced the same surface roughness Ra. Microhardness measuring showed thatthe deformation layer was extended to 8–16μm below the machined surface
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.626.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Surface Integrity and Fatigue Property of a High Speed Milled Titanium Alloy (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 53-54 (July 2008), p. 305-310 
    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: Surface integrity has a great effect on the fatigue property of titanium alloy. The surfaceintegrity and fatigue property of a high speed milled Ti-6.5Al-2Zr-1Mo-1V (TA15) titanium alloywere investigated in this research. The main objective of this paper is to study the influence of millingspeed on the surface integraty and fatigue property of the machined part. The surface roughness, workhardening, metallurgical structure and residual stress of the machined surface were studied in acutting speed range of from 50m/min to 300m/min. To verify the relationship between cutting speedand the surface integrity of machined surface, the fatigue property of titanium alloy specimens milledat four different cutting speeds ranging from 50 to 200m/min were compared at two stress levels. Thisresearch shows that the cutting speed has little effect on the work hardening, metallurgical structureand residual stress, but the surface roughness decreases with the increasing cutting speed. Therefore,increasing milling speed has a positive effect on the surface integrity and fatigue property of themachined surface
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.53-54.305.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Shear Strength of Brazed Joint between Diamond Grains and Steel Matrix Using a Ni-Cr Filler Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 501-506 
    Details
    ISSN: 1013-9826
    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 joining strength and corresponding fracture mechanism of the brazing interfacebetween diamond grains and tool matrix is one of the primary problems in the development andapplication of brazed diamond grinding tools. In this study shearing tests were performed for thebrazed joints, meanwhile the fracture mechanism and the joining characteristics were analyzeddeeply. The results indicate that, depending on the metallurgical integration effect through the atomdiffusion between the filler alloy and the metal matrix, and on the strong chemical bond by thenew-formed Cr-C compounds between the filler alloy and diamond grains, hard and reliable joiningis realized at the grain interfaces, which significantly supports the potential advantages of the latestbrazed diamond grinding tools
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.501.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    The Influences of Cutting Speed on the Fatigue of Titanium Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 10-12 (Dec. 2007), p. 742-746 
    Details
    ISSN: 1662-7482
    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: This research is concerned with the influences of cutting speed on the fatigue propertiesof high speed milled Ti-6.5Al-2Zr-1Mo-1V (TA15) titanium alloy. Four different cutting speedsranging from 50 to 200m/min were used to mill the specimens for fatigue test, and the fatigueproperties of them were studied at two stress levels: 80—800MPa and 90—900MPa. The fatiguelives of the specimens milled under different cutting speeds were compared. The fracture surfaceswere analyzed using scanning electron microscope (SEM), and cyclic stress-strain properties ofTA15 titanium alloy were investigated with a stress-strain gauge. The results showed that increasingcutting speed can help to improve the fatigue properties of titanium alloy, especially at a relativelylow cyclic stress level
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.742.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    The Finite Element Analysis of Surface Temperature on Dry Belt Grinding for Titanium Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 53-54 (July 2008), p. 219-224 
    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: This paper studies the grinding temperature field of dry belt grinding titanium alloysusing finite simulation and experiments. A reasonable finite element model of dry belt grindingtemperature field is established on the basis of ANSYS. And three kinds of boundary conditions areloaded on the element of a moving line heat source. The corresponding computer program isdesigned to calculate the temperature field for different grinding parameters, and the experimentresults show that the simulated temperature have good agreement with the measuring ones. Themodel could be utilized to forecast the distribution and variation characteristics of the grindingtemperature field under different conditions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.53-54.219.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental Research on the Cooling Effects of a New High Efficiency Green Cooling Method (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 53-54 (July 2008), p. 249-253 
    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: With more attention paying to the environment, green manufacturing (GM) has becomeinevitable trends in 21st century. Green cooling technology as one branch of GM always was oneresearch hotspot in manufacturing. In this paper, a new high efficiency cooling technology based onGM is proposed, called as CPMJ. In this technology, a little quantity of 0 °C water is carried by highpressure cryogenic air (–20 °C) and reaches the grinding zone in the form of high speed mist jet toenhance heat transfer and gain the best cooling effect. Heat transfer experiments and grindingexperiments were carried out to evaluate the cooling effects of CPMJ. Experimental results indicatedthat CPMJ can offer better cooling effects compared with cold air jet and flood cooling method.Grinding temperature was effectively reduced during grinding of titanium alloys with CPMJ
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.53-54.249.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Performance of Brazed Diamond Wheel in Grinding Cemented Carbide (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 381-384 
    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: A kind of brazed monolayer diamond grinding wheel was developed with a relativelyregular distribution of grains on the wheel surface. Grinding performances of this kind of brazedwheel in the surface grinding of cemented carbide were studied. The experiment results show that thegrinding forces ratio becomes higher with the increasing of the maximum undeformed chip thicknessand the specific energy falls with the material removal rate during grinding cemented carbide process.Under certain grinding conditions, the material was removed almost through plastic deformation andgood surface quality is gained. Furthermore, the grits of the brazed diamond grinding wheel failmainly in attritious wear modes other than pull-out ones in conventional electroplated and sintereddiamond tools, which indicates that the strong retention of brazing alloy to the diamond grits andlonger service life of this kind of wheel
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.381.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Tool Wear and Surface Integrity in High Speed Milling of a Near Alpha Titanium Alloy (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 644-647 
    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: Ti-6.5Al-2Zr-1Mo-1V is a near alpha titanium alloy strengthened by solid solution withAl and other components. In this study, a series of experiments on tool wear and surface integrity inhigh speed milling (HSM) of this alloy were carried out. The tool lives under different cuttingspeeds were studied and the corresponding empirical equation of tool life was derived. Additionally,the wear mechanism of cutting tools was also discussed. Finally, surface integrity, including surfaceroughness, metallograph, work hardening and residual stresses, were examined and analysed. Theresult shows that good surface quality of workpiece could be obtained in HSM of the alloy
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.644.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Microstructure and Performance of Porous Ni-Cr Alloy Bonded Diamond Grinding Wheel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 373-376 
    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: Although the porous metal bonded diamond grinding wheel, which has recently beendeveloped, had an excellent grinding performance for hard-brittle materials, its applications were onlyin precision grinding in past study. A new method for fabricating the new porous metal bondeddiamond grinding wheel by Ni-Cr alloy as bond and vacuum loose powder sintering was proposed inthis paper. The morphology of cross section of the segments and microstructure of interface betweendiamond grits and bond were analyzed. The wetting mechanism between Ni-Cr alloy bond anddiamond is reacting wetting. Machining performance experiments about grinding ratio and surfaceroughness have been carried out. The testing results show that the porous Ni-Cr alloy bondeddiamond grinding wheel has certainly fine machining performance in high grinding force occasion,and the maximal grinding ratio and best surface roughness were 6660 and 1.08[removed info] m, respectively
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.373.pdf
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