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

doi:10.2526/jseme.38.24

Cited by 3 publications

(3 citation statements)

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“…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%

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Additively processed TiAl6Nb7 alloy for biomedical applications

Hein

Hoyer

Schaper

2021

Materialwissenschaft Werkst

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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.

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Section: Resultssupporting

confidence: 75%

Section: Hardness Of Tial6nb7mentioning

confidence: 99%

Additively processed TiAl6Nb7 alloy for biomedical applications

Hein

Hoyer

Schaper

2021

Materialwissenschaft Werkst

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“…In the previous studies, the surface modi cation techniques such as strengthening method of the most-top surface and surface hard coating process are developed to improve the tribological properties of Ti materials 9,10) . For example, the application of titanium carbide (TiC) hard coating lm on Ti material is available to obtain a low and stable friction coef cient because TiC has a good coherence with Ti ma-trix 11) . That is, in case of the surface modi cation process by thin coating lms, the friction behavior and wear resistance are strongly dependent on both mechanical properties of the coating lms and bonding coherence between the coating lm and the matrix.…”

Section: Introductionmentioning

confidence: 99%

Tribological Property of α- Pure Titanium Strengthened by Nitrogen Solid-Solution

et al. 2018

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Mechanical and tribological properties of powder metallurgy (PM) α-titanium (Ti) materials with dissolved nitrogen atoms were evaluated in this study. Pin-on-disk wear test was carried out under dry condition, where a SKD61 disk specimen was used as a counter material. The elemental mixture of Ti and TiN powders was compacted and sintered in vacuum, and then extruded to the full-dense PM Ti rods. During sintering in vacuum, TiN particles were completely decomposed via reaction with Ti powder. Nitrogen atoms originated from TiN were dissolved into α-Ti matrix, and resulted in the remarkable improvement of micro-hardness and tensile strength. The additional heat treatment on the sintered Ti materials was effective to improve further elongation in tensile test because the localization of dissolved nitrogen atoms was decreased. The friction coef cient of nitrogen dissolved Ti material was extremely lower and more stable compared to pure Ti specimen employed as a reference material. The wear loss of the former was signi cantly smaller than that of the latter specimen. This is because of superior wear resistance of α-Ti material with nitrogen solid-solution due to a large increment of micro-hardness of Ti matrix.

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