Search for dissertations about: "toughness"

Showing result 1 - 5 of 159 swedish dissertations containing the word toughness.

  1. 1. Toughness of Tool Steel

    University dissertation from Uppsala : Institutionen för teknikvetenskaper

    Author : Henrik Jesperson; Uppsala universitet.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Toughness; Tool Steel; Heat Treatment; Temperature; Energy absorption; Impact Testing; Fracture Toughness Testing; Non-metallic Inclusions; Carbides; Nitrides; Statistics; TECHNOLOGY; TEKNIKVETENSKAP; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science;

    Abstract : Toughness is the ability to resist tensile stresses in the presence of a notch or crack. Sometimes gross cracking of industrial tools, mould or dies, occurs due to insufficient toughness. As the economic consequences of the gross cracking are serious, the toughness of industrial tool material, generally tool steel, is of paramount importance. READ MORE

  2. 2. Gear Tribology - Friction and Surface Topography

    University dissertation from Chalmers University of Technology

    Author : Li Xiao; Högskolan i Halmstad.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY; TEKNIKVETENSKAP; Friction; Surface topography; Toughness; Lay; Gears; Power transmission; Teknisk mekanik; Engineering mechanics; friction; surface topography; toughness; lay; gears; wfficiency; power transmission;

    Abstract : The quest for energy efficiency leads to the development of highly efficient power transmissions for vehicles. Gears are some of the most rugged and durable torque transmitters among machine elements. Friction between sliding surfaces at gear teeth is one major source of power loss. READ MORE

  3. 3. Toughness enhancement in transition metal nitrides

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Davide Giuseppe Sangiovanni; Linköpings universitet.; Linköpings universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cubic; transition metal nitrides; mechanical properties; ab initio; dft; toughness; ductility; electronic structure; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik;

    Abstract : Toughness enhancements can be induced in cubic-B1 transition metal nitride alloys by an increased occupation of the d-t2g metallic states. In this Licentiate Thesis I use density functional theory to investigate the mechanical properties of TiN and VN and of the ternaries obtained by replacing 50% of Ti and V atoms with M (M = V, Nb, Ta, Mo, and W) to form ordered structures with minimum number of inter-metallic bonds. READ MORE

  4. 4. Fracture toughness properties of duplex stainless steels

    University dissertation from Stockholm : KTH

    Author : Henrik Sieurin; KTH.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; duplex stainless steel; fracture toughness; austenite reformation; sigma phase; material optimisation; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Abstract : Good toughness properties in base and weld material enable the use of duplex stainless steels (DSS) in critical applications. DSS offer high strength compared to common austenitic stainless steels. READ MORE

  5. 5. Fracture toughness properties of a welded duplex stainless steel

    University dissertation from Stockholm : Materialvetenskap

    Author : Henrik Sieurin; KTH.; [2004]
    Keywords : duplex stainless steel; fracture toughness; brittle fracture; heat affected zone; austenite reformation;

    Abstract : .... READ MORE