Improving the Characteristics of Magnesium Workpieces by Burnishing Operations

Tönshoff, Hans Kurt; Friemuth, T.; Winkler, J.; Podolsky, C.

doi:10.1002/3527607552.ch65

Cited by 21 publications

(18 citation statements)

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“…On the other hand, it was observed that the AM90 alloy had the lowest El% value. When these results were evaluated, it was observed that intermetallic phases (Mg 17 Al 12 and Al 8 Mn 5 ) could be very effective in strengthening these magnesium alloys [7][8][9][10][11][12][13][14][15][16].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Influence of Al content on machinability of AM series magnesium alloys

Akyüz¹

2018

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This study investigates the effects of Al (aluminium) amount in AM series magnesium alloys on mechanical properties and machinability (cutting forces). Changes in microstructure and mechanical properties and their effects on cutting forces were analysed depending on the increase in Al amount. For this reason, AM series magnesium alloys (AM20, AM40, AM60, and AM90) with varying amounts of Al % (from 2 to 9 %) were used in the study. It was observed that in AM series magnesium alloys (containing 0.5 % Mn), intermetallic phases found in microstructure (Mg17Al12 and Al8Mn5) improved the mechanical properties and lowered machinability by rising the cutting forces (Fc) depending on the increase in Al amount. Also, the surface roughness (Ra) of intermetallic phases was observed to have an impact on flank build-up-FBU and chip formation. While AM90 had the highest values in terms of mechanical properties and surface quality, AM20 had the lowest values. On the other hand, AM20 had the highest El% values and machinability properties.

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Section: Mechanical Propertiesmentioning

confidence: 99%

“…Studies on the machinability of magnesium alloys are focused primarily on cutting tool materials and cutting angles along with flank build-up (FBU) formation, and their relation with combustion [4][5][6][7][8][9][10]. However, these kinds of studies are limited and insufficient to expound the machinability of these alloys.…”

Section: Introductionmentioning

confidence: 99%

Influence of Al content on machinability of AM series magnesium alloys

Akyüz¹

2018

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“…Tönshoff et al [14,18,19] studied the influence of tool material/coating on adhesive effects between tool and workpiece. They examined four different sets of carbide tools without coating, with TiN and CVD diamond coatings, and with only a solid PCD tip brazed to the carbide body, respectively.…”

Section: Introductionmentioning

confidence: 99%

Surface integrity of biodegradable orthopedic magnesium–calcium alloy by high-speed dry face milling

Salahshoor

Guo

2011

Prod. Eng. Res. Devel.

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Biodegradable magnesium-calcium (MgCa) implants have the ability to gradually dissolve and be absorbed in human body after implantation. Since the implant surface is in direct interaction with body fluids, surface integrity of MgCa implants are key factors influencing degradation rate of the biodegradable implants. Machining is often very necessary to make geometric features of implants. The effects of process parameters in dry high-speed face milling of MgCa0.8 (wt%) alloy on surface integrity characteristics, i.e. surface topography, surface roughness, microstructure, microhardness, and residual stresses, are investigated in this study. Polycrystalline diamond inserts are used to avoid material adhesion in milling MgCa alloy. High cutting speeds of up to 2,800 m/min and a broad range of feed and depth-of-cut values are selected to cover the regimes of finish and rough cutting. Average roughness value of 0.4 lm and shallow strain hardened depths are achieved. Little change of grain size can be observed in the near surface even for very slow feed value of 0.05 mm/rev. The surface residual stresses are measured to be highly compressive.

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“…Oil-based lubricants introduce the danger of oil mist explosions [17,18]. Dry machining of magnesium alloys makes it a green and economic manufacturing process due to the elimination of cutting fluids [17].…”

Section: Introductionmentioning

confidence: 99%