The effect of aging treatment on the fracture toughness and impact strength of injection molded Ni-625 superalloy parts

Özgün, Özgür; Yilmaz, Ramazan; Gülsoy, H. Özkan; Fındık, Fehim

doi:10.1016/j.matchar.2015.08.006

Cited by 51 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, varying contributions to the hardness are dominant at different sintering conditions and are visible in the density measurements, OM and SEM/EDS observations. Similar results were reported by Ozgun et al for traditionally-manufactured Nibased superalloys [12,18,24,25].…”

Section: Mechanical Properties 351 Microhardnesssupporting

confidence: 90%

“…Refractory elements Mo and Cr cause active solid solution hardening in Ni-based superalloys, and have higher moduli and melting temperatures than Nb. Alloy 625 was initially designed to gain strength through solid solution hardening; however, it is known that higher strength may be obtained by aging which produces Ni 3 Nb precipitation [12,24]. Therefore, it is important that Nb is present without carbide formation which is more difficult in BJP samples due to the residual C from the binder.…”

Section: Density Measurementsmentioning

confidence: 99%

“…Although the sintering process was conducted under high vacuum, chromium oxide (Cr 2 O 3 ) precipitate were identified with increasing amounts at increasing temperatures of up to 1280 °C (higher XRD peak volume), formed most likely due to a high oxidation speed at high temperatures of alloy 625 [12,24,32]. However, the amount of Cr 2 O 3 decreased from 1280 °C to 1300 °C.…”

Section: Phase Formation Study By Xrdmentioning

confidence: 99%

See 2 more Smart Citations

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

et al. 2016

View full text Add to dashboard Cite

Powder bed binder jet printing is an additive manufacturing method in which powder is deposited layer-by-layer and selectively joined in each layer with binder. Since the powder does not melt during printing, the density after printing is about 50%, and sintering is needed to densify as-printed parts. In this study, we investigate the effect of sintering temperature on density, microstructure, phase formation and mechanical properties of power bed binder jet printed alloy 625 parts. To determine the sintering temperatures, the as-received powder was subjected to differential scanning calorimetry analysis, and printed samples were cured and sintered at various temperatures under high vacuum. Density measurements, elemental analysis, phase formation and microstructure of as-printed, cured and sintered samples were investigated compared with mechanical properties. Results indicate that a fully densified parts with densities of up to 99.6%, as well as favorable mechanical properties (hardness of up to 238 HV 0.1 and UTS of up to 612 MPa) may be obtained for the sample sintered at 1280 °C. It is concluded that alloy 625 produced by powder bed binder jet printing can achieve similar density and mechanical properties as cast alloy 625.

show abstract

Section: Mechanical Properties 351 Microhardnesssupporting

confidence: 90%

Section: Density Measurementsmentioning

confidence: 99%

Section: Phase Formation Study By Xrdmentioning

confidence: 99%

See 1 more Smart Citation

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

et al. 2016

View full text Add to dashboard Cite

show abstract

“…It has taken many years to characterize the mechanism of repeating martensitic structure due to stress and temperature of SMAs [5]. Nickel alloys; they exhibit high wear resistance, corrosion resistance, toughness and high temperature resistance [6]. Titanium (Ti) alloys are resistant to high temperatures, high corrosion resistance and stable in chemical environments [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterisations of Welded Shape Memory Alloys

Doğan

Sari

2019

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

View full text Add to dashboard Cite

Today, with the development of technology, different welding methods were applied for different alloys. In this work, changing of functional properties after using welding methods for NiTi alloy samples were aimed. However, two different welding methods were employed for the same alloy and results were compared to each other and commented on them. In the present study, samples were welded with TIG and Laser welding and their cross section of welded zone was examined. Then these samples were examined in optical microscope and SEM. The advantages and disadvantages of both welding methods were reported. The basic distinction of TIG and laser welded samples examined in microscope were the scale of HAZ (Heat Affected Zone) of TIG welded samples. Nevertheless, due to more thermal input was applied for materials in TIG welded parts, more molten materials were detected, or heat effects were attained in this practice. In laser welding, heat input was less, and this could be recognized from the observed micrographs. When SEM figures were investigated, While HAZ was obviously distinguished from border of welding bath and the base metal was been separated from HAZ too. The twin structures were not observed in optical microscope; for that reason, they were investigated in SEM to see these twins in laser welded area.

show abstract

Effect of Ni–Nb Metallic Glass on Moderating the Shock Damage in Crystalline Ni-Amorphous Ni62Nb38 Nanocomposite Structure: A Molecular Dynamics Study

Reddy

Pal

2020

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

The effect of aging treatment on the fracture toughness and impact strength of injection molded Ni-625 superalloy parts

Cited by 51 publications

References 22 publications

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

Powder bed binder jet printed alloy 625: Densification, microstructure and mechanical properties

Microstructural Characterisations of Welded Shape Memory Alloys

Effect of Ni–Nb Metallic Glass on Moderating the Shock Damage in Crystalline Ni-Amorphous Ni62Nb38 Nanocomposite Structure: A Molecular Dynamics Study

Contact Info

Product

Resources

About