TY - JOUR
T1 - Strengthening in TiB-Reinforced Dual-phase Titanium Matrix Composites
T2 - Effect of TiB Volume Fraction and Matrix Microstructure
AU - Miao, Zheyu
AU - Chen, Yu
AU - Li, Qiang
AU - Zhao, Yakai
AU - Chen, Kai
AU - Gao, Yimin
AU - Ramamurty, Upadrasta
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society and ASM International 2025.
PY - 2025/12
Y1 - 2025/12
N2 - The influence of matrix microstructure on the strengthening behavior of titanium matrix composites (TMCs) has been rarely explored, and existing strengthening models often overlook the complexity introduced by dual-phase microstructural evolution. In this study, a series of TiB-reinforced dual-phase TMCs containing 0 to 8 vol pct TiB were fabricated via powder metallurgy (PM) and then heat treated following different protocols, resulting in equiaxed, lamellar, bimodal, and basketweave matrix microstructures. The effects of TiB content and matrix microstructure on mechanical properties and strengthening mechanisms were systematically examined through uniaxial compression and hardness tests. A schematic continuous cooling transformation diagram was constructed to correlate phase evolution with processing conditions. Quantitative analysis of the strengthening mechanisms reveal that load transfer is the dominant contributor. When the matrix morphology and hardness remain invariant, a constant strengthening efficiency of ~ 40 MPa per vol pct TiB was observed. However, variations in the proportion of hard phases (e.g., βtf and α′) in matrix significantly affect the strengthening efficiency. These findings highlight the pivotal role of matrix microstructure in governing the mechanical behavior of dual-phase TMCs and provide insights for more accurate modeling and design of advanced composites.
AB - The influence of matrix microstructure on the strengthening behavior of titanium matrix composites (TMCs) has been rarely explored, and existing strengthening models often overlook the complexity introduced by dual-phase microstructural evolution. In this study, a series of TiB-reinforced dual-phase TMCs containing 0 to 8 vol pct TiB were fabricated via powder metallurgy (PM) and then heat treated following different protocols, resulting in equiaxed, lamellar, bimodal, and basketweave matrix microstructures. The effects of TiB content and matrix microstructure on mechanical properties and strengthening mechanisms were systematically examined through uniaxial compression and hardness tests. A schematic continuous cooling transformation diagram was constructed to correlate phase evolution with processing conditions. Quantitative analysis of the strengthening mechanisms reveal that load transfer is the dominant contributor. When the matrix morphology and hardness remain invariant, a constant strengthening efficiency of ~ 40 MPa per vol pct TiB was observed. However, variations in the proportion of hard phases (e.g., βtf and α′) in matrix significantly affect the strengthening efficiency. These findings highlight the pivotal role of matrix microstructure in governing the mechanical behavior of dual-phase TMCs and provide insights for more accurate modeling and design of advanced composites.
UR - https://www.scopus.com/pages/publications/105021433544
U2 - 10.1007/s11661-025-08032-8
DO - 10.1007/s11661-025-08032-8
M3 - 文章
AN - SCOPUS:105021433544
SN - 1073-5623
VL - 56
SP - 5374
EP - 5390
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 12
ER -