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Fractography

About: Fractography is a research topic. Over the lifetime, 5043 publications have been published within this topic receiving 86068 citations.


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Journal ArticleDOI
13 Apr 2020
TL;DR: In this article, the fabrication of Aluminium composites with SiC and Jute Ash Particles, for sake of producing a cost-effective composite with enhanced properties was studied using pin on disc tribometer and it was found that wear resistance increases with-addition of reinforcement particles.
Abstract: Among several methods to fabricate Aluminium metal matrix composites, stir-casting technique is used for large-scale production due to its being less expensive. This research is concerned with the fabrication of Aluminium composites with SiC and Jute Ash Particles, for sake of producing a cost-effective composite with enhanced properties. Wear behaviour was studied using pin on disc tribometer and it was found that wear resistance increases with-addition of reinforcement particles. Fabricated composite samples showed almost 4 times better wear resistance compared to base material. Matrix metal reinforced with SiC showed the best wear resistance of all fabricated samples. Coefficient of friction significantly decreased with the presence of reinforcement due to formation of mechanical mixed layer. Tensile Strength was escalated with the introduction of reinforcement as load is transferred to strongly bonded reinforcement particles. Microhardness was enhanced with the introduction of reinforcement and Sample 2 with SiC as reinforcement showed the best microhardness. Microstructure and fractography of the base metal and fabricated composites was analyzed by Scanning Electron Microscope (SEM).

51 citations

Journal ArticleDOI
TL;DR: In this article, the fracture toughness of the 14YWT alloy was investigated at high temperatures up to 700°C and the authors proposed methods to improve the fracture resilience of the alloy.

51 citations

Journal ArticleDOI
TL;DR: In this article, a detailed analysis of the fracture mode for the three types of ductile iron, which failed under tensile and impact testing, were presented using the SEM and wear properties were determined using pin-on-ring machine, under dry sliding conditions.
Abstract: Microstructure, tensile, impact, hardness, fractography and wear characteristics were investigated for: (1) Austempered ductile iron (ADI); and (2) low alloyed ductile iron. Comparison has been made between the properties of these two types and that of conventional ductile iron. Detailed analysis, of the fracture mode for the 3 types of ductile iron, which failed under tensile and impact testing, were presented using the SEM. The wear properties were determined using pin-on-ring machine, under dry sliding conditions. The variation of mass loss and coefficient of friction with sliding distance, at different loads and speeds were presented and discussed. The wear mechanisms were investigated by means of subsurface observations. Microhardness test was used to study the change in the matrix strength with distance from the worn surface due to plastic deformation.

51 citations

Journal ArticleDOI
TL;DR: In this paper, the fracture surface energy was determined for boron carbide specimens with 0 to 15% porosity in a cylindrical pore model, and the fracture energy appeared to be independent of porosity but was inversely related to temperature.
Abstract: Young's modulus at room temperature and the fracture surface energy, up to 1200°C, were determined for boron carbide specimens with 0 to 15% porosity. Sonic modulus measurements indicated that the Young's modulus decreased as porosity increased in a manner characteristic of the cylindrical pore model. The fracture surface energy appeared to be independent of porosity but was inversely related to temperature. Fractography supported the low values of fracture surface energy that were obtained.

51 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of microstructural constituents on thermal fatigue resistance of A319 aluminum casting alloy was studied, and the results showed that samples with finer SDAS, lower porosity volume fraction and lower brittle intermetallic contents, as well as higher Si modification appeared to be highly beneficial for thermal fatigue performance.
Abstract: In this investigation, the effect of microstructural constituents on thermal fatigue resistance of A319 aluminum casting alloy was studied. For this purpose, both thermo-mechanical fatigue and thermal-shock fatigue experiments were performed in thermal cycling range between 40 and 250 °C. Following the results, samples with finer SDAS, lower porosity volume fraction and lower brittle intermetallic contents, as well as higher Si modification showed better thermal fatigue resistance. Moreover, T6 and T7 heat treatments appeared to be highly beneficial for thermal fatigue performance. According to the fractography analysis, porosities and coarse intermetallic phases were determined as the most prime locations for crack propagation.

51 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023120
2022254
2021229
2020206
2019205
2018176