Topic
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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01 Jan 1974
TL;DR: In this paper, the authors present a model of deformation of deformed and brittle fracture in a deformed deformed brittle fracture and a brittle fracture, and a Welding Index of the deformed fracture.
Abstract: Mechanical Testing Nondestructive Testing Fractography Ductile and Brittle Fracture Fatigue Corrosion Wear Hydrogen Degradation Metalworking Defects Casting Defects Heat Treatment Welding Index.
110 citations
TL;DR: The high-temperature mechanical properties of ABC-SiC with Al, B and C sintering additives have been examined at temperatures from ambient to 1500°C with the objective of characterizing the role of the grain-boundary film/phase as mentioned in this paper.
109 citations
TL;DR: In this article, a microwave joining of stainless steel (SS-316) to mild steel (MS) in bulk form has been successfully carried out using a multimode applicator at 2.45 GHz and 900 W.
108 citations
TL;DR: In this article, the development and failure of crack bridging ligaments were studied in detail in three dimensions using high-resolution X-ray microtomography, and direct comparison of these features has been made with scanning electron microscopy fractography.
Abstract: Intergranular stress corrosion cracking in a sensitised type 302 stainless steel wire has been observed in situ using high resolution X-ray microtomography. Tomography enables the development and failure of crack bridging ligaments to be studied in detail in three dimensions. Direct comparison of these features has been made with scanning electron microscopy fractography. The crack bridges failed in a ductile manner, with a morphology that is consistent with non-sensitised low energy grain boundaries.
107 citations
25 Aug 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a multistage fatigue model was used to quantify structure-property relations with respect to fatigue of an extruded AZ61 magnesium alloy using a MultiStage Fatigue (MSF) model.
Abstract: In this study, experiments were conducted to quantify structure-property relations with respect to fatigue of an extruded AZ61 magnesium alloy using a MultiStage Fatigue (MSF) model. Experiments were conducted in the extruded and transverse directions under low and high cycle strain control fatigue conditions. The cyclic behavior of this alloy displayed varying degrees of twinning and slip depending on the strain amplitude as observed in the hysteresis loops of both directions. Under low cyclic conditions, asymmetrical stress strain response was observed for both orientations. However, systematic stabilization of the hysteresis occurred by half-life due to subsequent twinning and detwinning mechanisms. In addition, under high cycle fatigue, pseudo-elasticity was observed at the first and at half-life cycles. Structure-property relations were quantified by examining the fracture surfaces of the fatigued specimens using a scanning electron microscope. In terms of crack incubation, fatigue cracks were found to initiate from intermetallic particles (inclusions) that were typically larger than the mean size. Quantified sources of fatigue crack incubation, microstructurally small cracks, and cyclic stress–strain behavior were correlated to the MSF model. Based on the specific material parameters, the MSF model was able to predict the difference in the strain-life results of the AZ61 magnesium alloy in the extruded and extruded transverse directions including the scatter of the experimental results. Finally, the MSF model revealed that the inclusion size was more important in determining the fatigue life than the anisotropic effects from the texture, yield, and work hardening.
106 citations