Journal of Materials Research and Technology· 2026Q1
Role of TiB reinforcement in the hydrogen embrittlement behavior of titanium matrix composites
- 0citations
- Q1SCImago
- 2026year
Short summary
Adding 1 vol.% TiB reinforcement significantly enhances hydrogen embrittlement resistance in titanium matrix composites (TMCs) by trapping hydrogen at TiB-matrix interfaces, reducing crack propagation.
AI-generated from the title and abstract; the full text is not read.
Key points
- 1 vol.% TiB reinforcement provides the highest resistance to hydrogen embrittlement in titanium matrix composites.
- TiB-matrix interfaces act as hydrogen traps, reducing diffusible hydrogen and suppressing crack propagation.
- Higher TiB content (4 vol.%) can lead to TiB fracture, which facilitates crack initiation and propagation.
- Hydrogen-assisted cracking preferentially initiates from surface TiH2 layers in all tested specimens.
AI-generated from the title and abstract; the full text is not read.
Abstract
The present work investigates the role of TiB reinforcement in hydrogen embrittlement (HE), with particular emphasis on hydrogen-assisted cracking (HAC) in titanium matrix composites (TMCs). TMCs containing 0, 1, and 4 vol.% TiB were investigated using in situ hydrogen charging tensile tests, Ag decoration, and microstructural analyses. Yield strength increased with TiB content, whereas HE resistance varied non-monotonically, with the 1 vol.% TiB-reinforced TMC showing the highest resistance. All hydrogen-charged specimens developed surface TiH 2 layers, from which HACs preferentially initiated. Cross-sectional observations revealed fewer HACs penetrating the matrix in the 1 vol.% TiB-reinforced TMC, whereas cracks were frequently associated with fractured TiB particles in the 4 vol.% TiB-reinforced TMC. Ag decoration revealed preferential hydrogen trapping at TiB–matrix interfaces, which reduced diffusible hydrogen ahead of crack tips and suppressed HAC propagation. However, premature TiB fracture can lead to the formation of TiB-fracture-associated cracks, which may coalesce with hydride-originated HACs and facilitate their propagation into the matrix. Thus, the HE resistance of TMCs is governed by the competition between the beneficial hydrogen-trapping effect of TiB–matrix interfaces and the detrimental effect of TiB particle fracture. These findings highlight the need to optimize TiB content by considering its non-monotonic influence on HE resistance when designing TMCs for hydrogen-containing environments.
The authors' abstract, as published at the source. Journal of Materials Research and Technology, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Metals and Alloys
Metals and AlloysMaterials Science