Microstructure, hardness and cavitation erosion behaviour of Ti–6Al–4V laser nitrided under different gas atmospheres

Kaspar, Jörg; Bretschneider, J.; Jacob, Stefan; Bonss, Steffen; Winderlich, B.; Brenner, Berndt

doi:10.1179/174329407x169430

Cited by 46 publications

(23 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the case of titanium alloys, the replacement of the inert gas by nitrogen is a technique which has been developed over the past 30 years for modifying the near-surface region without altering the bulk characteristics of titanium alloys (for example, Katayama et al, 1983;Walker et al, 1985;Bell et al, 1986;Mridha and Baker, 1991;Jianglong, 1993;Kloosterman and De Hosson, 1995;Nwobu et al, 1999;Kasper et al, 2007;abboud et al, 2008). Laser nitriding with a 100% nitrogen atmosphere was used in most of the early work, and produced a thin 5-10 mm surface layer of titanium nitride.…”

Section: Laser Nitridingmentioning

confidence: 99%

See 1 more Smart Citation

Laser surface modification of titanium alloys

Baker

2010

Surface Engineering of Light Alloys

View full text Add to dashboard Cite

Section: Laser Nitridingmentioning

confidence: 99%

“…12.14 Hu and Baker, 1999;Nwobu et al, 1999;Kasper et al, 2007;raaif et al, 2008) and flow rate (Mridha and Baker, 1998). The variation of hardness of TiN x as a function of N/Ti ratio was shown by Sproul et al (1989) for sputtered coatings, to have a narrow range between 3140 and 3400 kgmm -2 , the latter figure also given by Perry et al (1999).…”

Section: 17mentioning

confidence: 99%

Laser surface modification of titanium alloys

Baker

2010

Surface Engineering of Light Alloys

View full text Add to dashboard Cite

“…Thomann et.al [106][107] did experiments using 300 ns pulses at 10 Hz and fluences up to 25 J/cm². [94][95] carried out the synthesis method with Ti6Al4V. Experiments with 3.1 kW showed the development of TiN x up to 300 microns and a hardness of 900HV0.1.…”

Section: Fig 17 Cross Section Micrograph Of Co 2 Laser Nitrided Titamentioning

confidence: 99%

Laser nitriding: investigations on the model system TiN. A review

Höche

Schaaf

2010

Heat Mass Transfer

View full text Add to dashboard Cite

Nitriding is a well known technique to improve properties of materials. The process utilizing laser contains many different processes like heat transport and melting effects, diffusion and convection, which partially determine the synthesized coatings. This review concludes the research on titanium nitride synthesis in reactive ambient and draws conclusions for the general handling of the method. Afterwards, it becomes clear which and why, transport processes limit the coating properties. IntroductionHard material systems such as titanium nitride play an important role within the field of material sciences and industrial applications. In particular wear and corrosion protection are based on such systems. Beside the classical manufacturing procedures such as PVD or CVD, the method of the direct laser synthesis in a reactive gas environment, as examined here, represents an alternative to the production of such coatings. This review discusses the synthesis of such functional coatings on the system titanium -nitrogen by different laser irradiation based on own results respectively the literature and tries to give a general overview of the physical respectively transport processes taking place. Thus, experiments from the last three decades using similar experimental setups will be compared and discussed. Due to the availability of data of investigations utilizing titanium and nitrogen, this system was taken as a general model. After a discussion of several different experimental analyses and modelling results, the treatments get parameterized. This results in large potentials for technical applications. Finally, general conditions for the synthesis of such coatings with this procedure were set up. By means of these results it is possible to achieve purposefully predefined layer characteristics. The review concludes the most important publications containing research about this process. Thus, it could be assumed to be a reference in relation to laser nitriding or -carburizing. [4] or also hybrid procedures. A further alternative and very simple method is the direct lasers synthesis. The material is placed in a reactive gas environment and will be irradiated with laser light. Due to the developing physical and chemical effects coatings are synthesized, which possess special treatment dependent characteristics. Carburizing, nitro carburizing and/or nitriding are to most common methods from this field of processes. The method of nitriding particularly assists the improvement of tribological properties of surfaces. The surface hardness gets increased, whereby the wear resistance rises. Furthermore, these coatings are usually very non-reactive, which leads to an increase in corrosion protection. In the following the method will be studied more exactly and will be explained. Quantifying of the processes gets an important aim of the work. Arising phenomena will also be modelled. To do these investigations, the model titanium nitrogen has been used. It is a well known and often used system, and has been investigated ...

show abstract

“…Surface engineering techniques are efficient ways of improving tribological and corrosion behaviors of these alloys (Ref [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Liquid Phase Surface Treatment of Ti-6Al-4V Titanium Alloy by Pulsed Nd:YAG Laser

Ghorbani

Sohi

Torkamany

et al. 2015

J. of Materi Eng and Perform

View full text Add to dashboard Cite

In this paper, liquid phase surface engineering of Ti-6Al-4V titanium alloy using a 400 W average powerpulsed mode Nd:YAG laser has been studied. Optimized parameters of the laser treatment were determined based on the quality and properties of the fabricated surface layers. Optical microscope and scanning electron microscope equipped with EDS analyzer were used to investigate the microstructural and geometrical features of the laser-treated surfaces. In addition, x-ray diffraction method was also applied for phase analysis of the treated layers. The microstructures of the melted zones were mainly consisted of a¢ martensite together with Ti 3 Al intermetallics where a¢ martensite had hexagonal structure with acicular morphology. a¢ martensite transformed to fine a + b structure after tempering at 480°C for 7 h. Microhardness measurements showed approximately two-fold increases in hardness after surface melting (600-630 HV 0.2 ) compared to that of the parent metal (300-350 HV 0.2 ).

show abstract

Microstructure, hardness and cavitation erosion behaviour of Ti–6Al–4V laser nitrided under different gas atmospheres

Cited by 46 publications

References 20 publications

Laser surface modification of titanium alloys

Laser surface modification of titanium alloys

Laser nitriding: investigations on the model system TiN. A review

Liquid Phase Surface Treatment of Ti-6Al-4V Titanium Alloy by Pulsed Nd:YAG Laser

Contact Info

Product

Resources

About