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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"transformation toughening"”.
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Transformation toughening of metastable austenitic steels
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1984.
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Transformation toughening in phosphocarbide-strengthened austenitic steels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Transformation toughening and the martensitic transformation in ZrO2
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1985
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Dispersed-phase transformation toughening in ultrahigh-strength steels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Transformation toughening of [gamma][prime]-strengthened metastable austenitic steels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990.
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Mechanics of strain-induced transformation toughening in metastable austenitic steels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Investigation of the Lanthanide Sesquioxides as High Temperature Transformation Toughening Agents
… were investigated as possible high temperature transformation toughening agents. Specifically, the monoclinic to cubic (B $\Rightarrow$ C) transformation in Gd$\sb2$O$\sb3$ and Tb$\sb2$O$\sb3$ was examined. This transformation involves an 8-10% volume expansion and a shape change ($\Delta\beta$) …
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Theoretical study on toughening and design against fracture of functionally graded thermal barrier coatings
… excursions. Despite of many studies on toughening of brittle ceramics conducted in the past three decades, there was not much work so far done on the toughening of FG TBCs. The present project has two aims. The first aim is to develop a general micromechanical theory of the …
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The high temperature structural evolution of hafnia
The transformations of HfO2 are often described as analogous with the transformations in ZrO2 because of the similar crystal structures; however the phase transformations in HfO2 occur at higher temperatures. Even though this phase transformation has been extensively studied in ZrO2 , the …
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Design of Superelastic Secondary-Phase-Toughened Alloys
… an alloy design strategy to benefit from transformation toughening without retention of the transformation product by designing a multi-phase alloy combining a superelastic phase with a stable elasto-plastic phase. In particular, nano- and micro-scale precipitates, lamellar structures, and …
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"Examination of Several Potential ""Transformation Weakeners"" for Ceramic-Composite Interfaces"
… towards identifying several displacive phase transformations which could potentially be used in composites with alumina, YAG, and/or mullite. Phase transformations were examined in four materials: the rare earth pyroaluminates, e.g. $\rm Y\sb4Al\sb2O\sb9$; leucite, $\rm KAlSi\sb2O\sb6$; $\rm …
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The effect of oxide impurities on the microstructure and properties of Y-T.Z.P.
… had very limited direct effects on the transformation toughening mechanism, although there were differences in properties associated with the effects of the impurity additions on the microstructures of the sintered materials.
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Comparative study of physical properties of zirconia based dental ceramics
… SEM. Additionally, stress induced ransformation toughening was studied using Vickers indentation (load 20-50 kg) and Raman spectroscopy. The phase transformation was also analysed on fracture surfaces of specimens that failed after biaxial flexural strength and subcritical crack growth test. The …
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TEM-Grundlagenuntersuchungen zur Gefügeentwicklung in aushärtbaren Glimmerglaskeramiken
… mit einem Keimbildungsmaximum im Bereich der Transformationstemperatur Tg des Glases. Bei einer Zusammensetzung mit sechs Masseprozent Zirkoniumoxid lassen sich homogene einphasige Gläser herstellen, wenn die Abmessungen nicht zu groß sind, so dass die Abkühlung in wenigen Minuten erfolgt. …