scholarly journals Thermo–Mechanical Behavior and Constitutive Modeling of In Situ TiB2/7050 Al Metal Matrix Composites Over Wide Temperature and Strain Rate Ranges

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1212 ◽  
Author(s):  
Kunyang Lin ◽  
Wenhu Wang ◽  
Ruisong Jiang ◽  
Yifeng Xiong ◽  
Chenwei Shan
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Split Hopkinson Pressure Bar ◽  
Orthogonal Cutting ◽  
Matrix Composites ◽  
Wide Range ◽  
Cook Model

The thermo–mechanical behavior of in situ TiB2/7050 Al metal matrix composites is investigated by quasi-static and Split Hopkinson Pressure Bar compression tests over a wide range of temperature (20~30 °C) and strain rate (0.001~5000 s−1). Johnson–Cook and Khan–Liu constitutive models determined from curve fitting and constrained optimization are used to predict the flow stress during deformation. In addition, another Johnson–Cook model calculated from an orthogonal cutting experiment and finite element simulation is also compared in this study. The prediction capability of these models is compared in terms of correlation coefficient and average absolute error. Due to the assumptions in orthogonal cutting theory, the determined Johnson–Cook model from cutting cannot describe the material deformation behavior accurately. The results also show that the Khan–Liu model has better performance in characterizing the material’s thermo–mechanical behavior.

scholarly journals Mechanical Behavior of Titanium Based Metal Matrix Composites Reinforced with TiC or TiB Particles under Quasi-Static and High Strain-Rate Compression

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6837
Author(s):  
Pavlo E. Markovsky ◽  
Jacek Janiszewski ◽  
Oleksandr O. Stasyuk ◽  
Vadim I. Bondarchuk ◽  
Dmytro G. Savvakin ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Strain ◽  
Strain Rates ◽  
Matrix Composites ◽  
Strain Rate Compression ◽  
Static Conditions

The mechanical behavior of titanium alloys has been mostly studied in quasi-static conditions when the strain rate does not exceed 10 s−1, while the studies performed in dynamic settings specifically for Ti-based composites are limited. Such data are critical to prevent the “strength margin” approach, which is used to assure the part performance under dynamic conditions in the absence of relevant data. The purpose of this study was to obtain data on the mechanical behavior of Ti-based composites under dynamic condition. The Metal Matrix Composites (MMC) on the base of the alloy Ti-6Al-4V (wt.%) were made using Blended Elemental Powder Metallurgy with different amounts of reinforcing particles: 5, 10, and 20% of TiC or 5, 10% (vol.) of TiB. Composites were studied at high strain rate compression ~1–3·103·s−1 using the split Hopkinson pressure bar. Mechanical behavior was analyzed considering strain rate, phase composition, microstructure, and strain energy (SE). It is shown that for the strain rates up to 1920 s−1, the strength and SE of MMC with 5% TiC are substantially higher compared to particles free alloy. The particles TiC localize the plastic deformation at the micro level, and fracturing occurs mainly by crushing particles and their aggregates. TiB MMCs have a finer grain structure and different mechanical behavior. MMC with 5 and 10% TiB do not break down at strain rates up to almost 3000 s−1; and 10% MMC surpasses other materials in the SE at strain rates exceeding 2200 s−1. The deformation mechanism of MMCs was evaluated.

Study on Chip Formation and Simulation of Cutting In-Situ TiB2 Particle Reinforced 7050Al Metal Matrix Composites

2017 ◽  
Author(s):  
Yifeng Xiong ◽  
Wenhu Wang ◽  
Ruisong Jiang ◽  
Kunyang Lin ◽  
Mingwei Shao
Keyword(s):  
Metal Matrix Composites ◽  
Chip Formation ◽  
Metal Matrix ◽  
Orthogonal Cutting ◽  
Fem Simulation ◽  
Cutting Speed ◽  
Tib2 Particle ◽  
Ex Situ ◽  
Matrix Composites

The in-situ TiB2/7050Al composites is a new kind of particle reinforced metal matrix composites (PRMMCs) with superior properties such as low density, improved strength and increased wear resistance. At present, the study of PRMMCs is focused on the ex-situ SiCp/Al composites, which has been researched from material preparation process to machinability. To the new kind in-situ TiB2/7050Al MMCs, few papers have been published on the cutting performance and finite element method (FEM) simulation. This work involves study on the chip formation and FEM simulation in cutting in-situ TiB2/7050Al MMCs. The orthogonal cutting experiments were carried out in our study. The chip geometric shapes, cutting forces and shear angle were investigated. Meanwhile, the cutting simulation model was established by applying Abaqus-Explicit method to have a deep insight of the chip formation process and mechanisms. The results show that the saw-tooth chips were common found under either low or high cutting speed and small or large feed rate. The mechanisms of chip formation included plastic deformation, adiabatic shear, shear slip and crack extension.

Effect of TiB2 particle addition on the mechanical properties of Al/TiB2 in situ formed metal matrix composites

2018 ◽  
Vol 60 (12) ◽  
pp. 1221-1224 ◽  
Author(s):  
Balachandran Gobalakrishnan ◽  
P. Ramadoss Lakshminarayanan ◽  
Raju Varahamoorthi
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tib2 Particle ◽  
Matrix Composites ◽  
Particle Addition

Wear testing of in situ cast AA8011-TiB2 metal matrix composites

2019 ◽  
Vol 61 (8) ◽  
pp. 779-786
Author(s):  
Bellamballi Munivenkatappan Muthami Selvan ◽  
Veeramani Anandakrishnan ◽  
Muthukannan Duraiselvam ◽  
Sivaraj Sundarameenakshi
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Wear Testing ◽  
Matrix Composites

Synthesis and mechanical behavior of nanostructured Al 5083/n-TiB 2 metal matrix composites

2016 ◽  
Vol 656 ◽  
pp. 241-248 ◽  
Author(s):  
Meijuan Li ◽  
Kaka Ma ◽  
Lin Jiang ◽  
Hanry Yang ◽  
Enrique J. Lavernia ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites

Numerical simulation of strain rate effect on the inelastic behavior of metal matrix composites

2017 ◽  
Vol 24 (2) ◽  
pp. 279-288
Author(s):  
Qiang Chen ◽  
Zhi Zhai ◽  
Xiaojun Zhu ◽  
Caibin Xu ◽  
Xuefeng Chen
Keyword(s):  
Strain Rate ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Plastic Region ◽  
Micromechanical Model ◽  
Matrix Composites ◽  
Cross Sectional ◽  
Axis Orientation ◽  
Array Pattern ◽  
Sectional Shape

AbstractThe primary goal of this paper is to investigate the combined effects of strain rate and microscopic parameters (fiber off-axis orientation, array pattern and cross-sectional shape) on the mechanical behavior of metal matrix composites (MMCs). To this end, a rate-dependent micromechanical model by the combination of finite-volume theory and Bodner-Partom viscoplastic model is developed to analyze the inelastic response of MMCs. In the simulations, the fibers are modeled as linearly elastic while the metal matrix exhibits viscoplasticity. The macroscopic stress-strain response, local stress and strain fields are obtained simultaneously. An acceptable agreement has been found between the model’s prediction and finite-element results, which demonstrates the good predictive capabilities of the proposed method. It is concluded that the composite response is strongly affected by strain rate, fiber array pattern and cross-sectional shape in the elastic-plastic region but to a lesser extent in the elastic region. Furthermore, the clustering array provides stiffer response than random and square ones; the square fiber predicts stiffer response than circular and elliptical ones. However, increasing the strain rate will weaken the influence of clustering array and square fibers.

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