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 paper, the thermal fatigue performance of SAC alloys with Pb terminations was investigated by accelerated temperature cycling with and without thermal preconditioning, and failure data were reported as characteristic life η (number of cycles to 63.2% failure) from a two-parameter Weibull distribution.
Abstract: The thermal fatigue performances of Sn98.5Ag1.0Cu0.5 (SAC105), Sn97.5Ag2.0Cu0.5 (SAC205), Sn96.5Ag3.0Cu0.5 (SAC305) and Sn95.5Ag4.0Cu0.5 (SAC405) solder alloys with Pb terminations were investigated by accelerated temperature cycling with and without thermal preconditioning. The performance of the SAC alloys was compared to eutectic SnPb and aged SAC alloys. The test vehicle consists of commercial 2512 ceramic chip resistors soldered to printed wiring boards using the different solder alloy compositions. The solder joints were monitored continuously during a thermal cycle of 0°C -100°C with a ramp rate of 9°C/min and a 30 min dwell between temperature extremes. Failures were defined in accordance with the IPC-9701 A industry test guidelines and failure data are reported as characteristic life η (number of cycles to 63.2% failure) from a two-parameter Weibull distribution. The microstructural evolution was characterized using metallographic techniques and back-scattered scanning electron microscopy. The findings show that the lifetime of the alloys can be ranked as follows: SAC 305 ~ SAC 405 >; SAC 205 >; SAC 105 >; SAC305 aged >; SAC 105 aged >; SnPb and to determine mechanisms of failure, electron microscopy analysis and fractography were performed on post-cycled components.

40 citations

Journal ArticleDOI
TL;DR: In this article, the microstructures, crystallographic orientations, and dislocation characteristics under hydrogen-induced quasi-cleavage fracture features of an as-quenched, lath martensitic (α') 22MnB5 steel were analyzed by a combination of multiple analytical tools.

40 citations

Journal ArticleDOI
TL;DR: In this article, Al 7075 and Mg AZ31 alloys were joined by diffusion bonding method in pressure range of 10-35 MPa at temperatures of 430-450 °C for 60 min under a vacuum of 13.3 MPa.

40 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the tensile embrittlement of lamellar Ti-5553 alloy by analyzing its deformation mechanism, damage behavior and tensile fractography.

40 citations

Journal ArticleDOI
TL;DR: In this article, the failure behavior of a PET/glass injection-moulding compound and of its unfilled matrix material was characterized using constant strain-rate mechanical testing and surface fractography.
Abstract: Constant strain-rate mechanical testing and surface fractography were used to characterize the failure behaviour of a PET/glass injection-moulding compound and of its unfilled matrix material. Parameters for this investigation were temperature and strain rate. The matrix material exhibited a viscous-brittle transition between room temperature and 60° C. Low temperature failure occurred by craze growth, followed by slow and rapid crack propagation. The composite material likewise behaved as a viscous solid at superambient temperatures. Failure at low temperatures and/or high deformation rates occurred by brittle matrix fracture and fibre pull-out. Under these conditions, mechanical properties improved, relative to those at room temperatures. At intermediate temperatures and/or low strain rates, failure occurred via matrix crazing and crack propagation near the fibre ends. An observed serration of the fracture path at high strain rates is suggested to be due to the need for high shear stresses at the fibre-matrix interface.

40 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