Surface Modification of Titanium Using Scanning Electrode Method by Electro Discharge Machining.

Tsukahara, Hidekazu; Minami, Hisashi; Masui, Kiyonori; Sone, Takumi; Demizu, Kei

doi:10.2526/jseme.35.79_24

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reasons for hardness enhancement could also influence the mechanical properties. Metallurgical transformation, surface hardening as well as the residual stress states could have an effect on the increased mechanical properties of the electrical discharge machined condition [55, 63–69]. The strength to hardness correlation for casted TiAl6V4, based on empirical relationships, is in good agreement, with the obtained results [78, 79].…”

Section: Resultssupporting

confidence: 75%

“…Due to the electrical discharge machining process the hardness may be increased. Metallurgical transformation like phase changes and grain refinement, surface hardening due to hydrogen or oxygen embrittlement or diffusion of alloying elements as well as residual stress states could favour the enhancement in hardness [55,[63][64][65][66][67][68][69].…”

Section: Hardness Of Tial6nb7mentioning

confidence: 99%

See 1 more Smart Citation

Additively processed TiAl6Nb7 alloy for biomedical applications

Hein

Hoyer

Schaper

2021

Materialwissenschaft Werkst

View full text Add to dashboard Cite

Laser beam melting (LBM) is an advanced manufacturing technology providing special features and the possibility to produce complex and individual parts directly from a CAD model. TiAl6V4 is the most common used titanium alloy particularly in biomedical applications. TiAl6Nb7 shows promising improvements especially regarding biocompatible properties due to the substitution of the hazardous vanadium. This work focuses on the examination of laser beam melted TiAl6Nb7. For microstructural investigation scanning electron microscopy including energy‐dispersive x‐ray spectroscopy as well as electron backscatter diffraction are utilized. The laser beam melted related acicular microstructure as well as the corresponding mechanical properties, which are determined by hardness measurements and tensile tests, are investigated. The laser beam melted alloy meets, except of breaking elongation A, the mechanical demands like ultimate tensile strength Rm, yield strength Rp0.2, Vickers hardness HV of international standard ISO 5832‐11. Next steps contain comparison between TiAl6Nb7 and TiAl6V4 in different conditions. Further investigations aim at improving mechanical properties of TiAl6Nb7 by heat treatments and assessment of their influence on the microstructure as well as examination regarding the corrosive behavior in human body‐like conditions.

show abstract

Section: Resultssupporting

confidence: 75%

Section: Hardness Of Tial6nb7mentioning

confidence: 99%

Additively processed TiAl6Nb7 alloy for biomedical applications

Hein

Hoyer

Schaper

2021

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…For machining Mo and Mo composite, electrical discharge machining (EDM) is generally used. However, a molybdenum carbide (MoC and Mo 2 C) layer with high hardness and brittleness is formed by EDM in kerosene oil [1]. Therefore, many cracksoccur in the EDMed surface [2,3,4,5].Moreover, Mo becomes recrystallizationembrittlement at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Crack-Less Electrical Discharge Machining of Molybdenum with Titanium Electrode

Kaneko

Furutani

2014

AMM

View full text Add to dashboard Cite

This paper describescrack-less electrical discharge machining (EDM) of molybdenum (Mo) with titanium (Ti) electrode. Mo is often machined by EDM because of its high hardness. However, a molybdenum carbide (MoC and Mo2C) layer with high hardness and brittleness is formed by EDM in kerosene oil. Moreover, Mo becomes recrystallizationembrittlement at high temperature. Therefore, many cracks occurred in the EDMed surface. On the other hand, the addition of Ti rises recrystallization temperature and improves high temperature strength of Mo.In order to decrease the cracks in the machined surface, Mo was machined by EDM with a Ti electrode in deionized water. In the case of the positive electrode polarity, many cracks occurred in the base material and recast layer. The cracks in the base material might generate by crystal grain boundary embrittlement. In contrast, the EDMed surface indicated crack-less on the negative electrode polarity. To clarify the causes of crack-less surface on negative electrode polarity, componential analysis of EDMed surface was carried out. The component ratio of Ti on the negative electrode polarity was higher than that on the positive. In addition, the recast layer was composed by Mo-Ti solid solution.

show abstract