The prospects for hybrid fiber-reinforced Ti-TiB-matrix composites

Hanusiak, W.; Fields, J. L.; Hammond, Vincent H.; Grabow, R.; Yolton, C. F.

doi:10.1007/s11837-004-0128-0

Cited by 4 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When considering Ti alloy use the in aerospace industry, they are often utilized in constructing airframe parts and gas turbine engines parts [2][3][4][5]. In order to meet the present-day demand for improved mechanical properties and to reduce the production costs of Ti alloys, research has been conducted on various Ti MMCs [6][7][8][9][10]. Reinforcements for MMCs are generally introduced in the form of fibers (continuous or discontinuous) or particles [11,12].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Study of Directional Isothermal Fatigue in Additively Manufactured Ti-TiB Metal Matrix Composites

Balakumar,

Riahi,

Edrisy

2024

Metals

View full text Add to dashboard Cite

Additive manufacturing (AM) techniques are widely investigated for the cost-effective use of titanium (Ti) alloys in various aerospace applications. One of the AM techniques developed for such applications is plasma transferred arc solid free-form fabrication (PTA-SFFF). Materials manufactured through AM techniques often exhibit anisotropies in mechanical properties due to the layer-by-layer material build. In this regard, the present study investigates the isothermal directional fatigue of a Ti-TiB metal matrix composite (MMC) manufactured by PTA-SFFF. This investigation includes a rotating beam fatigue test in the fully reversed condition (stress ratio, R = −1), electron microscopy, and calculations for fatigue life predictions using Paris’ and modified Paris’ equations. The fatigue experiments were performed at 350 °C using specimen with the test axis oriented diagonally (45°) and parallel (90°) to the AM builds directions. The fatigue values from the current experiments along with literature data find that the Ti MMC manufactured via PTA-SFFF exhibit fatigue anisotropy reporting highest strength in 90° and lowest in perpendicular (0°) AM build directions. Furthermore, calculations were performed to evaluate the optimum values of the stress intensity modification factor (λ) for fatigue life prediction in 0°, 45°, and 90° AM build directions. It was found that for the specimens with 45°, and 90° AM build directions, the computed intensity modification factors were very similar. This suggests that the initial fatigue crack characteristics such as location, shape, and size were similar in both 45°, and 90° AM build directions. However, in 0° AM build direction, the computed stress intensity modification factor was different from that of the 45°, and 90° AM build directions. This indicates that the fatigue crack initiation at 0° AM build direction is different compared to the other two directions considered in this study. Moreover, the quality of fatigue life prediction was assessed by calculating R2 values for both Paris and modified Paris predictions. Using the R2 values, it was found that the fatigue life predictions made by the modified Paris equation resulted in improved prediction accuracy for all three builds, and the percentage improvement ranged from 30% to 60%. Additionally, electron microscopy investigations of 0°, 45°, and 90° AM build specimens revealed extensive damage to the TiB particle compared to the Ti matrix as well as frequent TiB clusters in all three AM build directions. These observations suggest that the spread of these TiB clusters plays a role in the fatigue anisotropy of Ti-TiB MMCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Study of Directional Isothermal Fatigue in Additively Manufactured Ti-TiB Metal Matrix Composites

Balakumar,

Riahi,

Edrisy

2024

Metals

View full text Add to dashboard Cite

show abstract

“…Ti-B modified composites have applications in various sectors such as the automotive industry [20], aerospace [21] and in biomedical / sport [22]. B 4 C reinforced Titanium matrix composites exhibit significantly enhanced properties, such as higher hardness, improved corrosion and wear resistance since it serves as precursor for TiB, TiB 2 and TiC phases [23], [24].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Titanium Metal Matrix Composites Using Additive Manufacturing

Vály

Grech

Neubauer

et al. 2017

KEM

View full text Add to dashboard Cite

In this work, the “4M-System” (Machine for Multi-Material-Manufacturing) has been developed by RHP Technology for the manufacturing of Titanium Metal Matrix Composites. This equipment allows the Additive Layer Manufacturing (ALM) of large structures and uses a Plasma Transferred Arc (PTA) as a heat source for depositing feedstocks (powder/wire) layer by layer onto a substrate. Test coupons, made of Titanium powders and having different concentrations of B4C particles, were deposited to form Metal Matrix Composites. Various processing parameters such as deposition rate, travel speed of the torch as well as plasma parameters (power/current/gas flow) were assessed for getting pore- and crack-free samples. After deposition, the specimens were cut and the cross-sections were analysed by optical- and scanning electron microscopy. Furthermore, the hardness, Young’s Modulus, and tensile strength were measured. Ti-Metal Matrix Composite materials resulted in higher strength and Young´s Modulus in comparison to the pure Ti-metal matrix. Using the 4M-System, B4C particle reinforced Ti-MMC’s were successfully manufactured. Thus the 4M-System proved the capability of joining multi-material concepts, which also promises to create graded concentrations of reinforcement in the material.

show abstract