Boriding of Binary Ni-Ti and Ternary Ni-Ti-Cu Shape Memory Alloys

Uçar, N.; Turku, N.; Özdemir, Ahmet Faruk; Çalık, Adnan

doi:10.12693/aphyspola.130.492

Cited by 6 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, we say that the boride layer thickness increases when the boronizing temperature and increasing treatment time increase due to the diffusion of boron atoms. Other phases detected on the surface of the borided specimens mainly included silicides and borosilicides of nickel [24]. These phases formed due to the additional presence of SiC in the boriding powders, which is used as a diluent for the boriding source (B 4 C).…”

Section: Resultsmentioning

confidence: 99%

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

et al. 2017

Self Cite

View full text Add to dashboard Cite

In this work, the boriding of binary Ti-Ni shape memory alloys was carried out in a solid medium at 1173 and 1273 K for 2, 4, and 8 h using the powder pack method with Ekabor-Ni powders. The boride layer was characterized by optical microscopy and scanning electron microscopy. The obtained results show that boride layer thickness increases with the increasing boriding temperature and time. Depending on temperature and boride layer thickness, the diffusion process is thermally activated, with the mean value of the activation energy being close to 67 kJ/mol.

show abstract

Section: Resultsmentioning

confidence: 99%

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Various surface treatment methods, aimed at improving wear and corrosion resistance, and mechanical properties of alloys are described in many recent reports [1]. Gas nitriding (GN) is a thermochemical surface treatment, which has been widely used for components made of steel, to improve the surface hardness, corrosion and wear resistance [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel

et al. 2017

View full text Add to dashboard Cite

In this study, effect of double stage gas nitriding of 34CrAlNi7-10 steel was analyzed. Nitriding processes were carried out in two stages. in the first stage, samples were nitridied at 500• C for 10 h and then in second stage nitriding process was continued at 530 and 550• C for 20 h. During both stages, the nitrogen activity on surface was controlled by the nitriding potential, which is a thermodynamical control parameter for controlled gas nitriding process. The nitriding potential was kept constant, at value of 10, during the first stage and was varied in the range of 3.2-0.2, for both nitriding temperatures, in the second stage. The presence of nitrides, formed on the surface of test materials was determined by XRD analysis technique. The morphology of nitrided layer was studied by optical microscopy. The microhardness of the surfaces of nitrided samples in HV1 was between 955 and 1029. The measurements have shown that the thickness of the compound layer (white layer) has varied between 6.85-23.90 µm and that the growth of the white layer and microhardness gradient were strongly affected by the nitriding potential and the temperature. Diffusion depths as Nht(HV) for Vickers Hardness were determined and compared.

show abstract

“…Boriding treatment allows obtaining surface hardness much higher than those obtained by other conventional treatments like hardening, nitriding or carbonitriding. Boriding thermochemical surface treatments can be achieved by various methods: in a solid medium in powders [3,4] or with pastes [5], in a liquid medium of fused salts with or without electrolysis [6], or in a gaseous medium [7]. The main advantage of the boriding treatment applied to steel is that it allows combining a high surface hardness with a low coefficient of friction, which promotes a good wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Boriding on the Fatigue Resistance of C20 Carbon Steel

2017

View full text Add to dashboard Cite

Boriding is a thermochemical surface treatment used to improve corrosion and wear resistance of hardened steels. In this work, we study the effect of boriding treatment in solid medium on the cyclic fatigue resistance of C20 carbon steel. Specimens of untreated and borided C20 steel in a solid medium consisting of 5% B4C, 5% NaBF4 and 90% SiC were subjected to rotating-bend fatigue device. The results showed that the improvement in fatigue resistance carried by the boriding treatment on C20 steel is low. This was explained by the presence of FeB boride in addition to Fe2B boride, which leads to surface cracking.

show abstract

Boriding of Binary Ni-Ti and Ternary Ni-Ti-Cu Shape Memory Alloys

Cited by 6 publications

References 30 publications

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel

Effect of Boriding on the Fatigue Resistance of C20 Carbon Steel

Contact Info

Product

Resources

About