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You searched for +publisher:"The Ohio State University" +contributor:("Windl, Wolfgan"). One record found.

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The Ohio State University

1. Hutchinson, Nicholas W. Experimental input for the design of metallic glass/crystalline composites.

Degree: PhD, Materials Science and Engineering, 2013, The Ohio State University

Bulk metallic glasses often exhibit exceptional strength and large elastic strains, but the structural applications of bulk metallic glasses are limited by their extremely low tensile ductility. Below the glass transition temperature of the alloy, plastic deformation occurs primarily in narrow shear bands, which propagate unimpeded through the monolithic glass structure, resulting in catastrophic failure under tensile loading. A number of studies have added crystalline reinforcements to the glassy matrix in an effort to block shear band propagation and increase ductility. The reinforcements in these bulk metallic glass matrix composites (BMGMC’s) can be added as ex situ particles or fibers infiltrated by the glass- forming liquid, or can be formed in situ, either via devitrification of the glass during post-processing or as a second phase that precipitates from the melt during solidification . The size, distribution, and mechanical properties of the reinforcement phase have significant impact on the ductility of the composite. However, surprisingly little quantitative microstructural information is available for BMGMC’s, particularly those formed by precipitation from the melt.In this work, we examine two in situ BMGMC’s in which a ductile crystalline phase precipitates during solidification of the melt, resulting in a complex dendritic structure embedded in a continuous glass matrix. A 3D serial sectioning process was used to image the microstructure at regular intervals by removing slices of material using a dual beam focused ion – scanning electron microscope (FIB). Due to the complex nature of the microstructure, measurements of key features were conducted using a 3D measurement method that was developed for this purpose. Experiments were also conducted to provide experimental input for the development and tuning of finite element models. Changes in the elastic modulus of the composite were evaluated over a range of stresses that encompassed the yield point of the composite. An interesting increase in the modulus was observed prior to yielding. The work is concluded with a study of the accumulation of strain within the composite microstructure during tensile loading. The strain was determined and evaluated by a digital image correlation method. Advisors/Committee Members: Flores, Katharine (Advisor), Windl, Wolfgan (Advisor).

Subjects/Keywords: Materials Science; metallic glass; composite; microstructure; digital image correlation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hutchinson, N. W. (2013). Experimental input for the design of metallic glass/crystalline composites. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1385512484

Chicago Manual of Style (16th Edition):

Hutchinson, Nicholas W. “Experimental input for the design of metallic glass/crystalline composites.” 2013. Doctoral Dissertation, The Ohio State University. Accessed February 15, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385512484.

MLA Handbook (7th Edition):

Hutchinson, Nicholas W. “Experimental input for the design of metallic glass/crystalline composites.” 2013. Web. 15 Feb 2019.

Vancouver:

Hutchinson NW. Experimental input for the design of metallic glass/crystalline composites. [Internet] [Doctoral dissertation]. The Ohio State University; 2013. [cited 2019 Feb 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1385512484.

Council of Science Editors:

Hutchinson NW. Experimental input for the design of metallic glass/crystalline composites. [Doctoral Dissertation]. The Ohio State University; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1385512484

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