Global ETD Search
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 20 of 52 for “"Formability"”.
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FORMABILITY OF SHEET-METAL UNDER LATERAL PRESSURE
… radius. The findings also indicate that formability is improved by the use of smaller die shoulder radii. Moreover, they point toward the necessity of specifying the die-shoulder radius when employing the bulge test to assess material formability. The membrane stresses induced during …
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Elevated temperature formability of Ti-6A1-4V.
Massachusetts Institute of Technology. Dept. of Metallurgy and Materials Science. Thesis. 1970. M.S.
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Control of texture and formability in ferritic stainless steels.
… on the microstructures, textures and press-formability of commercial 17 Cr, 0.05C (430) steel and low-interstitial Ti-stabilised 12 Cr (409) and 17 Cr (430 Ti) steels have been studied. The annealing textures have beencorrelated with tensile strain ratio measurements and from this …
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The relationship between texture and formability in sheet metals
… present work mechanical properties, yield loci,formability parameters, earing and the stretching behaviour of a range of differently textured FCC and BCC materials were investigated both theoretically and expereimentally. The Crystallite Orientation Distribution. Function (CODF), expressed in …
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Frictional and geometric effects in punch-stretch sheet metal formability testing
Includes bibliographical references (pages 401-404).
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Formability of Sheet Metal Under Non-Coaxial and Zig Zag Strain Paths
… thesis is to provide a wider conception of the formability of sheet metal to cover a wider range of sheet metal products. In circular cup drawing, the deformation in the work-piece is coaxial owing to axial symmetry; in other words, during the forming operation, the principal axes of stress and …
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Evaluation of the formability properties of nitrogen alloyed metastable austenitic stainless steels
This study examines the formability of an AISI 301 based metastable austenitic stainless steel, in which nitrogen partially substitutes nickel. In order to understand the formability of the experimental alloys, the tensile behaviour of the alloys is characterised. The tensile properties of …
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Hot formability and microstructural development of spray-deposited Al-Li alloy and composite.
The deformational and microstructural behaviour of the commercial Al-Li alloy 8090 and an 8090 based composite containing silicon carbide particulate has been investigated. The materials were deformed at elevated temperature by the test methods of plane strain compression (PSC) and torsion to …
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The influence of martensitic transformation on the formability of 304L stainless steel sheet
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Influence of strain rate on the mechanical properties and formability of ferritic stainless steels
Includes bibliographical references.
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Experimental characterization and modeling of the plastic behavior of a thirdgeneration advanced high strength steel sheet
… owing to its good compromise between the formability and production cost. The current development stage of these steels so far has few products available on the market, as well as little research aimed at studying their formability. With an ultimate tensile strength greater than 1000 MPa …
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Finite element assisted prediction of ductile fracture in sheet bulging of magnesium alloys
… These studies have shown however, that the formability of these alloys is very difficult to predict. The material properties of magnesium alloys would suggest that they are ideal for sheet metal forming, yet their formability is still inferior to many other alloys used in sheet metal …
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Enhancing the Sustainability of Aluminium Production and Products
… understanding the effects of intermetallics on formability, and the second on using through-process models to compensate for the effects of tramp elements. Chapter 3 explores the use of crystal plasticity modelling to examine the impact of intermetallic distributions and volume fractions, …
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Effect of microstructure on the fracture response of advanced high strength steels
… selected to observe microstructural effects on formability included four 780 MPa strength, and four 980 MPa strength AHSS grades produced with varying processing conditions. The grades were an uncoated DP780, a high yield DP780, a galvanized DP780, a TRIP780, a galvannealed DP980, a galvanized …
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Retrogression-reaging and hot forming of AA7075
… seek to improve upon the room-temperature formability of AA7075-T6 and incorporate the paint-bake cycle (PBC) into the heat treatment process. The PBC is a mandatory heat treatment used to cure the paint applied to automobiles during production. Currently, the PBC is conducted at 180 °C for …
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A model for the diaphragm forming process
… to force the material onto a one-sided tool. The formability of this process is difficult to predict. Some doubly-curved shapes can be made, while others cannot be formed or always wrinkle.
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The Development of Compression Moldable Polymer Composite Bipolar Plates for Fuel Cells
… for bipolar plate production. However, formability and through-plane conductivity needs improvement. The laminate bipolar plates developed at Virginia Tech are made using wet-lay material in the core and a thermoplastic/graphite mixture on the surfaces. The wet-lay material provides …
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The microstructure and some phase transformation characteristics of the dual phase steel 3CR12
… the continuous yielding, work hardening, formability and toughness can be attributed to this microstructure. The thesis provides a base for the discussion of methods of "designing" the steel for particular applications.
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The study of intermetallic particles in aluminium alloy AA3104 can-body stock during homogenisation
… of beverage can bodies. This alloy has excellent formability and strength properties. The evolution of the AA3104 microstructure and intermetallic particles during thermo-mechanical processing (TMP) has a direct impact on quality parameters, which influence the formability of the material during …
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The effect of stabilization heat treatment on AA5182 aluminium alloy
… alloy selection for this part is based on the formability of the material and its resistance to softening over time. Owing to the intricate design of the can end opening tab, it is vital that the material maintains its strength during its shelf life. The mechanical properties of the AA5182 …
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