Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles

Mimoto, Takanori; Nakanishi, Nozomi; Umeda, Junko et al.

Transactions of JWRI, 2011, 40(2), 63-68

Number of Access:288（2025-04-27 14:59 Counts）

Identifier to cite or link to this item: https://doi.org/10.18910/5200

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Title
Mechanical Properties and Strengthening Mechanism of Pure Ti Powder Composite Material Reinforced with Carbon Nano Particles
Creator
CreatorName
Mimoto, Takanori
CreatorName
Nakanishi, Nozomi
NRID
1000050345162 1000050345162
researchmap permalink
umeda umeda
Scopus Author ID
23478776500 23478776500
ORCID
0000-0001-8678-9708 0000-0001-8678-9708
CreatorName
Umeda, Junko
NRID
1000050345138 1000050345138
researchmap permalink
kondoh kondoh
Scopus Author ID
9942942300 9942942300
CreatorName
Kondoh, Katsuyoshi
Subject
Titanium matrix composite
Carbon black particles
Tensile properties
Solid solution hardening
Dispersion strengthening
In-situ formed titanium carbide
Abstract
The strengthening mechanisms of titanium-carbon black (CB) nano particle composite materials were investigated quantitatively in the present study. The titanium matrix composite (TMC) specimens were prepared via a powder metallurgy (P/M) route including the wet coating process for composite titanium (Ti) powders with un-bundled CB nano particles, consolidation by spark plasma sintering (SPS) and subsequent hot extrusion. The extruded TMC, with carbon content of 2.66 at.%, exhibited excellent tensile strength of 837 MPa in 0.2%YS, 899 MPa in UTS and 18.7% in elongation at ambient temperature. In this composite, some of additive CB nano particles were dissolved into the Ti matrix as a solid solution element. The other CBs and Ti matrix were chemically reacted when sintering, and resulted in the in-situ formed titanium carbide (TiC) compounds, which were uniformly distributed throughout the Ti matrix. These TiC dispersoids promoted the dynamic recrystallization during hot extrusion process, and resulted in the Ti grain refinement. Consequently, carbon solid solution hardening, TiC dispersion strengthening and grain refinement enhanced the mechanical performance of the TMC. In particular, the effect of TiC reinforcements, accounting for about 60% of the whole strengthening behavior, played the most significant role.
Publisher
大阪大学接合科学研究所
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
Joining and Welding Research Institute, Osaka University
Source Title
Transactions of JWRI
Volume (Issue)
40(2)
Page
63-68
Date of Issued
2011-12
Language
English
Handle URL
https://hdl.handle.net/11094/5200
DOI
https://doi.org/10.18910/5200
PISSN
03874508
NCID
AA00867058
Access Rights
open access
oaire:version
Version of Record
Category
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.40 No.2 (2011-12)