Damage evolution and failure mechanisms in additively manufactured stainless steel

Carlton, Holly D.; Haboub, A.; Gallegos, G. F.; Parkinson, Dilworth Y.; MacDowell, Alastair A.

doi:10.1016/j.msea.2015.10.073

Cited by 261 publications

(109 citation statements)

References 32 publications

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“…Other nondestructive methods, such as acoustic emission (AE) and electrical resistance have been utilized to study the types of damage that occur in CMCs under various types of loading and environmental conditions . The use of X‐ray computed microtomography to observe damage in various types of CMCs has proven to be a valuable nondestructive techniques …”

Section: Introductionsupporting

confidence: 90%

Damage evolution in SiC/SiC unidirectional composites by X‐ray tomography

2020

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Melt infiltrated SiC/SiC ceramic matrix composite unidirectional (UD) composite specimens were imaged under load using X‐ray microtomography techniques in order to visualize the evolution of damage accumulation and to quantify damage mechanisms within the composite such as matrix cracking and fiber breaking. The data obtained from these in situ tensile tests were used in comparison with current models and literature results. Three‐dimensional (3D) tomography images were used to measure the location and spacing of matrix cracking that occurred at increasing stress increments during testing within two UD composite specimens. The number of broken fibers and the location of each fiber break gap that occurred within the volume of both specimens were also quantified. The 3D locations of fiber breaks were correlated with the location of each matrix crack within the volume of the specimen and it was found that at the stress scanned directly before failure, most of the fiber breaks occur within 100 microns of a matrix crack.

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Section: Introductionsupporting

confidence: 90%

Damage evolution in SiC/SiC unidirectional composites by X‐ray tomography

2020

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“…It should be noted that the distribution of the porosity, size, and morphology is not homogeneous, and local porosity concentrations could be much higher than the global porosity, which makes the locations with the highest porosity, containing defects with the largest size, or aspect ratio more vulnerable during loading. Hence, controlling and minimizing defects is challenging.…”

Section: Features Of Metal Ammentioning

confidence: 99%

Metal Alloys for Fusion‐Based Additive Manufacturing

et al. 2018

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Metal additive manufacturing (AM) is an innovative manufacturing technique, which builds parts incrementally layer by layer. Thus, metal AM has inherent advantages in part complexity, time, and waste saving. However, due to its complex thermal cycle and rapid solidification during processing, the alloys well suit and commercially used for metal AM today are limited. Therefore, it is important to understand the alloying strategy and current progress with materials performance to consider alloy development for metal AM. This review presents the current range of alloys available for metal AM, including titanium, steel, nickel, aluminum, less common alloys (including Mg alloys, metal matrix composites alloys, and low melting point alloys), and compositionally complex alloys (including bulk metallic glasses and high entropy alloys) with a focus on the relationship between compositions, processing, microstructures, and properties of each alloy system. In addition, some promising alloy systems for metal AM are highlighted. Approaches for designing and optimizing new materials for metal AM have been summarized.

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“…Designed porosity is present only in lattice structures while undesigned porosity is found commonly in all AM parts. Another example was presented in the recent paper by Carlton et al [80], in which the authors performed tensile tests of SLM as-built and annealed 316L stainless steel in-situ during white light synchrotron XCT. This experiment showed that the role of the porosity distribution is larger than the role of bulk density in affecting fracture mechanisms.…”

Section: Recent Novel Xct Porosity Measurementsmentioning

confidence: 99%

X-ray computed tomography for additive manufacturing: a review

Thompson

Maskery

Leach

2016

Meas. Sci. Technol.

382

151

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Abstract. In this review, the use of x-ray computed tomography (XCT) is examined, identifying the requirement for volumetric dimensional measurements in industrial verification of additively manufactured (AM) parts. The XCT technology and AM processes are summarised, and their historical use is documented. The use of XCT and AM as tools for medical reverse engineering is discussed, and the transition of XCT from a tool used solely for imaging to a vital metrological instrument is documented. The current states of the combined technologies are then examined in detail, separated into porosity measurements and general dimensional measurements. In the conclusions of this review, the limitation of resolution on improvement of porosity measurements and the lack of research regarding the measurement of surface texture are identified as the primary barriers to ongoing adoption of XCT in AM. The limitations of both AM and XCT regarding slow speeds and high costs, when compared to other manufacturing and measurement techniques, are also noted as general barriers to continued adoption of XCT and AM.

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Damage evolution and failure mechanisms in additively manufactured stainless steel

Cited by 261 publications

References 32 publications

Damage evolution in SiC/SiC unidirectional composites by X‐ray tomography

Damage evolution in SiC/SiC unidirectional composites by X‐ray tomography

Metal Alloys for Fusion‐Based Additive Manufacturing

X-ray computed tomography for additive manufacturing: a review

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