Effect of Cr and Nb on the phase transformation and pore formation of Ti-Al base alloys

Kayani, Saif Haider; Park, Nho-Kwang

doi:10.1016/j.jallcom.2017.03.005

Cited by 19 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ti-Al intermetallic phases have excellent mechanical properties and good oxidation resistance up to 700°C. [1][2][3][4][5][6][7][8] The alloying element Nb is used to enhance their oxidation resistance, hot formability and creep resistance. [9][10][11][12] The ternary Ti-Al-Nb system also contains many intermetallics which have a potential for producing alloys with various mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria of the Ti-Al-Nb System at 1000, 1100 and 1150 °C

Liu

Zhang

et al. 2018

J. Phase Equilib. Diffus.

View full text Add to dashboard Cite

1000, 1100 and 1150°C isothermal sections of the Ti-Al-Nb system were studied using x-ray diffraction, scanning electron microscopy and electron probe microanalysis. A small island-like region of single b 0 is present at 1000, but absent at 1100 and 1150°C. c 1 is not a stable phase at 1000 and 1150°C. Three three-phase fields (a 2 ? b 0 ? r, b 0 ? r ? c and a 2 ? b 0 ? c) are identified in the 1000°C isothermal section (30-60 at.% Ti content). The 1100°C isothermal section is firstly studied completely. It includes six three-phase and thirteen two-phase fields. Two three-phase fields b ? a 2 ? c and b ? r ? c are identified in the isothermal section (30-60 at.% Ti content) at 1150°C. These data are helpful to the fabrication of the TiAl and Ti 2 AlNb intermetallics. Keywords intermetallics Á microstructure Á phase diagram Á TiAl alloy Dedicate to the celebration of Prof. Zhanpeng Jin's 80th birthday. This invited article is part of a special issue of the Journal of Phase Equilibria and Diffusion in honor of Prof. Zhanpeng Jin's 80th birthday. The special issue was organized by Prof. Ji-Cheng (JC) Zhao,

show abstract

Section: Introductionmentioning

confidence: 99%

Phase Equilibria of the Ti-Al-Nb System at 1000, 1100 and 1150 °C

Liu

Zhang

et al. 2018

J. Phase Equilib. Diffus.

View full text Add to dashboard Cite

show abstract

“…The applied pressure was 300 MPa and the holding time was 5 min. Subsequently, the green compacts were heated to 700 • C with a series of heating rates (2,5,10,12,15,20 C min − 1 ) in a tube furnace (OTF-1200X, China) under H 2 atmosphere (200 mL m − 1 , 99.99%). After the furnace cooled to the room temperature, obtained samples were transferred out of the furnace.…”

Section: Raw Materials and Preparation Processmentioning

confidence: 99%

“…Porous NiAl intermetallic compounds can be synthesized by (1) space holder technique (SHT) [9][10][11], (2) elemental powder metallurgy (EPM) [12][13][14], (3) combustion synthesis (CS) [15][16][17]. Compared with SHT and EPM, porous NiAl compounds synthesized by CS possess high porosity and a skeleton structure with connected channels [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of the heating rate on the thermal explosion behavior and oxidation resistance of 3D-structure porous NiAl intermetallic

Cai

Cao

et al. 2022

Materials Characterization

View full text Add to dashboard Cite

“…% of Nb yielded a similar pore size as the Ti 52 Al 48 (at. %) alloy owing to its lower solubility in Ti [31]. In contrast, Li et al [32] prepared TiAl 3 IMCs of fine pore sizes using fine Al and Ti powders.…”

Section: Introductionmentioning

confidence: 99%

Influence of Powder Size on Pore Characteristics and Intermetallic Phase Kinetics in Porous Ti-Al Alloys

Kayani,

Ajmal,

Kim

et al. 2024

Crystals

Self Cite

View full text Add to dashboard Cite

This study investigates the impact of varying powder size on porosity, pore parameters, and intermetallic phase reaction during the reactive sintering of porous TiAl alloys. Ti52Al48 alloys were prepared using coarse (200 mesh) and fine (325 mesh) Ti powders through elemental powder metallurgy and were subsequently sintered at different temperatures, 600 and 1200 °C. Our findings reveal a consistent pore morphology and intermetallic phase microstructure across both alloys. However, samples containing fine Ti powder exhibited a higher number density of small pores compared to those incorporating coarse Ti powders. Additionally, alloys prepared with fine Ti powders demonstrated a higher porosity than those prepared with coarse powders. Consequently, fine Ti powder promoted enhanced diffusion between Ti and Al during sintering, as reflected by the lower onset temperature and enthalpy of intermetallic reaction during sintering.

show abstract

Effect of Cr and Nb on the phase transformation and pore formation of Ti-Al base alloys

Cited by 19 publications

References 20 publications

Phase Equilibria of the Ti-Al-Nb System at 1000, 1100 and 1150 °C

Phase Equilibria of the Ti-Al-Nb System at 1000, 1100 and 1150 °C

Effect of the heating rate on the thermal explosion behavior and oxidation resistance of 3D-structure porous NiAl intermetallic

Influence of Powder Size on Pore Characteristics and Intermetallic Phase Kinetics in Porous Ti-Al Alloys

Contact Info

Product

Resources

About