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A Wear Analysis Study Of Selected Alternative Foundry Tooling Materials Using Impact Abrasion Testing, L. Fred Vondra
A Wear Analysis Study Of Selected Alternative Foundry Tooling Materials Using Impact Abrasion Testing, L. Fred Vondra
Dissertations and Theses @ UNI
The purpose of this study was to simulate the wear characteristics of foundry tooling using an impact abrasion test apparatus. The wear characteristic was exhibited by non-metallic materials and was measured as a function of percentage weight loss and was benchmarked against Class 30 gray iron. The research question focused on whether or not a non-metallic material exists that exhibits comparable or superior wear characteristics to Class 30 gray iron for possible consideration as tooling materials for foundry applications. The information obtained adds to knowledge and is useful to foundry professionals in making tooling decisions.
The 34 test materials were …
Factors Affecting The Development Of Unassigned Patents In Iowa, Diane Darlene Wheeler Schou
Factors Affecting The Development Of Unassigned Patents In Iowa, Diane Darlene Wheeler Schou
Dissertations and Theses @ UNI
Inventors granted patents from 1975 to 1990 in Iowa identified, via a questionnaire, where they perceived their invention on Bright's scale of eight stages of development. Stages were: idea, rationalization (has merit), experimentation, demonstration of prototypes, working model, commercial (market entry), commercial acceptance (sales), and commercial proliferation (other markets). The questions identified factors affecting development. The factors included: resources assisting development, events influencing start-up, sources of money for development, method of manufacturing, experiences with manufacturers, marketing techniques, sales, profit/loss, concerns, patent renewals, and age of patents. Open-ended questions allowed for additional comments.
Commercial acceptance or commercial proliferation was achieved by …