New Composite Metal Foams under Compressive Cyclic Loadings

Rabiei, Afsaneh; Neville, Brian; Reese, Nick; Vendra, Lakshmi

doi:10.4028/0-87849-428-6.1868

Cited by 4 publications

(3 citation statements)

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“…More details of the casting procedure are available elsewhere. [12][13][14][15][16][17][18] The samples processed by powder metallurgy methods use similar sphere and matrix materials because no difference in melting point is needed for this processing method. Powder metallurgy LC steel CMF is produced from LC steel spheres with an outer diameter of 2.0 mm, wall thickness of 0.1 mm, and wall porosity of about 5 pct with Ancorsteel-1000 LC steel powder (Hoeganaes Corporation, Cinnaminson, NJ) mixed with 0.8 pct graphite as the matrix.…”

Section: A Materials and Sample Processing Methodsmentioning

confidence: 99%

“…CMF is produced by both casting and powder metallurgy techniques and has been tested extensively in monotonic compression, loading-unloading compression, and compression-compression fatigue, showing significant improvement over the performance of existing metal foams. [10][11][12][13][14][15][16][17] In addition, a water cooling method has been developed to optimize the microstructural characteristics and mechanical properties of the foam processed by casting methods. [18] This article reports the failure analysis of CMFs processed by both air-and water-cooled casting as well as powder metallurgy techniques under bending using in situ acoustic emission analysis during loading.…”

Section: Introductionmentioning

confidence: 99%

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Bending Properties of Al-Steel and Steel-Steel Composite Metal Foams

Brown

Vendra

Rabiei

2010

Metall Mater Trans A

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The performance of new composite metal foams (CMFs) under bending was evaluated with simultaneous acoustic emission (AE) monitoring on samples processed by cast and powder metallurgy (PM) techniques. The results showed high maximum strength in all samples up to 86 MPa with more ductile failure in PM samples. Acoustic emission behavior confirmed that the dominating failure mechanism of cast CMF is the brittle fracture of intermetallic phases that mostly exist at the interface of the steel spheres with the aluminum matrix, whereas in PM samples (100 pct steel), the failure is governed by the propagation of preexisting microporosities in the matrix resulting in a complete ductile failure. SEM imaging of the fracture surfaces supported these findings.

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Section: A Materials and Sample Processing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending Properties of Al-Steel and Steel-Steel Composite Metal Foams

Brown

Vendra

Rabiei

2010

Metall Mater Trans A

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“…Quasi-static compression testing shows a uniform deformation behavior without the presence of localized collapse bands, resulting in a high plateau strength in the range of 50-150 MPa depending on the material and processing methods (1). Composite metal foams have also been tested extensively under compression-compression fatigue, loading-unloading compression, and 4 point bending (2)(3)(4)(5)(6)(7)(8). However, their behavior at higher loading rates has never been tested.…”

Section: Introductionmentioning

confidence: 99%

A Study on Dynamic Properties of Composite Metal Foams

Rabiei¹,

Hammond²

2012

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Approved for public release; distribution is unlimited.ii REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)December 2012 REPORT TYPE ARL-CR-706 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES* Department of Mechanical and Aerospace Engineering, Raleigh, NC 27695 ABSTRACTComposite metal foam is a new class of closed cell metal foam offering higher energy absorption compared to the monolithic material at approximately one-third of the density. The superior energy absorption capability of composite metal foam makes this material a potential candidate for structural components such as automotive crash box and crumple zones. However, a systematic study on the dynamic properties of composite metal foams is necessary before they can be utilized in vehicular structures. It has been reported that the energy absorption of other metal foams will increase by increasing the strain rate up to 4× at impact speeds of up to 200 m/s. In this study, the dynamic properties of composite metal foams under various impact speeds are obtained through a variety of experimental techniques. Subsequently, there results are compared to those published in the literature for other foams tested at various impact rates.

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Effect of various parameters on properties of composite steel foams under variety of loading rates

Rabiei

Garcia-Avila

2013

Materials Science and Engineering: A

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New Composite Metal Foams under Compressive Cyclic Loadings

Cited by 4 publications

References 0 publications

Bending Properties of Al-Steel and Steel-Steel Composite Metal Foams

Bending Properties of Al-Steel and Steel-Steel Composite Metal Foams

A Study on Dynamic Properties of Composite Metal Foams

Effect of various parameters on properties of composite steel foams under variety of loading rates

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