scispace - formally typeset
Search or ask a question
Topic

Fractography

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


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the suitability of interstitial free (IF) steel sheets of thickness 0.6, 0.9, 1.2, and 1.6mm for press forming operations were examined by obtaining the forming limit diagrams.

31 citations

Journal ArticleDOI
TL;DR: In this article, the role of aerosil powder as a filler material is investigated, and the fracture mode is analyzed by scanning electron microscopy, showing a considerable drop in interlaminar shear stress for the higher fibre volume fraction, whereas the introduction of filler materials to the composite causes no change.
Abstract: The mechanical behaviour of glass fibre-reinforced epoxy composites with introduced layers of materials and with fibre coating is studied The role of aerosil powder as a filler material is investigated, and the fracture mode is analysed by scanning electron microscopy The investigation shows a considerable drop in interlaminar shear stress for the higher fibre volume fraction, whereas the introduction of filler materials to the composite causes no change Surface mat-reinforced samples show a marginal increase in shear stress Exposure to moisture reduces the interlaminar shear stress value faster for the higher fibre volume fraction, thereby highlighting the role of the interfacial area Impact values for coated and uncoated fibres show an identical trend with exposure to dry heat, the former always recording lower values The impact value decreases faster with moisture absorption for the composite with the higher fibre content Fractography reveals poor adhesion in the coated laminates

31 citations

Journal ArticleDOI
TL;DR: In this article, the effect of particulate loading on the elastic, tensile, compressive and fracture properties of Al2O3/Al metal-matrix composites fabricated by a pressureless-liquid-metal-infiltration process was investigated.
Abstract: An investigation was made to determine the effect of particulate loading on the elastic, tensile, compressive and fracture properties of Al2O3/Al metal-matrix composites fabricated by a pressureless-liquid-metal-infiltration process. The elastic modulus was found to be strongly affected by the reinforcement content, falling within the Hashin-Shtrikman bounds. The Young's modulus of the most highly loaded composite was 170 GPa; compare with 65 GPa for the unreinforced alloy. The strength systematically increased with loading, and the rate of increase also increased with loading. The measured yield strengths were nominally the same in both tension and compression; however, the composites possessed far greater ultimate strengths and strains-to-failure in compression than in tension. At 52 vol % reinforcement, yield strengths in tension and compression of 491 and 440 MPa, respectively, were measured, whereas the associated ultimate strengths were 531 and 1035 MPa, respectively. In tension, the yield and ultimate strengths of the base alloy were found to be 170 and 268 MPa, respectively. The composites displayed a nearly constant fracture toughness for all particulate loadings, with values approaching 20 MPa m1/2 compared to a value of 29 MPa m1/2 for the base alloy. Using fractography, the tensile-failure mechanism was characterized as transgranular fracture of the Al2O3 particles followed by ductile rupture of the Al-alloy matrix, with no debonding at the matrix/reinforcement interfaces.

31 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of specimen size on the ductile-brittle transition behavior and the fracture sequence were investigated by means of Charpy absorbed energy measurement and fractography, using the full size, the half size and the one-third size V-notch specimens of 9Cr-W steels.

31 citations

Journal ArticleDOI
TL;DR: In this paper, the authors measured fatigue striations for both large and small fatigue cracks by SEM fractography, while dislocation structures adjacent to the fatigue surfaces were characterized by TEM, and compared the results of the fatigue striation and dislocation structure characterization with crack growth data to assess the fatigue mechanisms in HSLA-80 steels and the cause for the lack of a threshold in the small cracks.
Abstract: Fatigue mechanisms of large and small cracks in Cu-bearing HSLA-80 steels were studied at ambient temperature. Fatigue striations were measured for both large and small fatigue cracks by SEM fractography, while dislocation structures adjacent to the fatigue surfaces were characterized by TEM. The results of the fatigue striation and dislocation structure characterization are compared with crack growth data to assess the fatigue mechanisms in HSLA-80 steels and the cause for the lack of a threshold in the small cracks. Comparisons revealed that both large and small cracks propagated via an intermittent growth mechanism. The growth kinetics of small cracks were consistent with the extrapolation of the power-law regime of the large crack data to stress ranges below the large-crack threshold. The absence of a growth threshold in small cracks was discussed in conjunction with the large-crack threshold.

31 citations


Network Information
Related Topics (5)
Microstructure
148.6K papers, 2.2M citations
91% related
Alloy
171.8K papers, 1.7M citations
91% related
Fracture mechanics
58.3K papers, 1.3M citations
90% related
Grain boundary
70.1K papers, 1.5M citations
89% related
Ultimate tensile strength
129.2K papers, 2.1M citations
88% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023120
2022254
2021229
2020206
2019205
2018176