Author: Durgalakshmi DoraiswamyPublisher:
ISBN:
Category :
Languages : en
Pages : 244
Book Description
The Effect of Grain Size and Stability on Ambient Temperature Tensile and Creep Deformation Behavior of Metastable Beta Titanium Alloys
Author: Durgalakshmi DoraiswamyPublisher:
ISBN:
Category :
Languages : en
Pages : 244
Book Description
Effect of Stability and Grain Size on Ambient Temperature Tensile and Creep Behavior of Beta Titanium Alloys
Author: Anand RameshFundamental Studies on Ambient Temperature Creep Deformation Behavior of Alpha and Alpha-beta Titanium Alloys
Author: Charles Arthur GreenePublisher:
ISBN:
Category : Titanium alloys
Languages : en
Pages : 392
Book Description
Systematic studies were undertaken to determine the ambient temperature tensile and creep deformation behavior, including mechanisms, of alpha Ti-Mn, and alpha-beta and beta Ti-Mn and Ti-V alloys. In regard to the a Ti-Mn alloy, it was found that when creep tested at 95% of the 0.2% Yield Stress (YS) the creep strain of the coarse grained (500 microns) material was significantly higher than the fine grained (45 microns) material. This effect was found to be due to the scientifically interesting phenomenon of time dependent twinning in coarse grained alpha phase. Such a phenomenon has never been reported before. Based on optical and scanning electron microscopic observations of displacements of the grid lines obtained by electron lithography and transmission electron microscopic observations, it was found that there are strong slip/twin, twin/slip and twin/twin interactions during creep deformation. The tensile deformation of beta titanium alloys depended on the alloying elements. In the beta Ti-Mn alloy the tensile deformation mechanisms were found to be coarse and wavy slip whereas in the beta Ti-V alloy the deformation mechanisms were found to be coarse and wavy slip as well as twinning. This difference was attributed to the difference in stability of the beta phase. In contrast to the a Ti-Mn alloy the creep deformation in the beta Ti-Mn alloy was found to be negligibly small at a stress level of 95% YS. With respect to alpha-beta titanium alloys, for similar volume percent and morphology of phases, the tensile and creep deformation mechanisms were also found to depend on the alloying elements. In regard to the alpha-beta Ti-Mn alloy, the deformation mechanisms were found to be predominately fine slip in alpha and beta phases and occasional interface sliding.
Fundamental Studies on Ambient Temperature Creep Deformation Behavior of Alpha and Alpha-Beta Titanium Alloys
Author: Charles Arthur GreenePublisher:
ISBN:
Category : Titanium alloys
Languages : en
Pages : 0
Book Description
Systematic studies were undertaken to determine the ambient temperature tensile and creep deformation behavior, including mechanisms, of alpha Ti-Mn, and alpha-beta and beta Ti-Mn and Ti-V alloys. In regard to the a Ti-Mn alloy, it was found that when creep tested at 95% of the 0.2% Yield Stress (YS) the creep strain of the coarse grained (500 microns) material was significantly higher than the fine grained (45 microns) material. This effect was found to be due to the scientifically interesting phenomenon of time dependent twinning in coarse grained alpha phase. Such a phenomenon has never been reported before. Based on optical and scanning electron microscopic observations of displacements of the grid lines obtained by electron lithography and transmission electron microscopic observations, it was found that there are strong slip/twin, twin/slip and twin/twin interactions during creep deformation. The tensile deformation of beta titanium alloys depended on the alloying elements. In the beta Ti-Mn alloy the tensile deformation mechanisms were found to be coarse and wavy slip whereas in the beta Ti-V alloy the deformation mechanisms were found to be coarse and wavy slip as well as twinning. This difference was attributed to the difference in stability of the beta phase. In contrast to the a Ti-Mn alloy the creep deformation in the beta Ti-Mn alloy was found to be negligibly small at a stress level of 95% YS. With respect to alpha-beta titanium alloys, for similar volume percent and morphology of phases, the tensile and creep deformation mechanisms were also found to depend on the alloying elements. In regard to the alpha-beta Ti-Mn alloy, the deformation mechanisms were found to be predominately fine slip in alpha and beta phases and occasional interface sliding.
INTERMEDIATE TEMPERATURE CREEP AND RUPTURE BEHAVIOR OF TITANIUM AND TITANIUM BASE ALLOYS PART III; EFFECTS OF HOT ROLLING, EMBRITTLEMENT, AND INTERSTITIAL ELEMENTS
Author: Jeremy V. Gluck, James W. FreemanPublisher:
ISBN:
Category :
Languages : en
Pages : 115
Book Description
First Quarterly Progress Report to materials laboratory, wright air development center department of the air force on intermediate temperature creep and rupture behavior of titanium and titanium alloys
Author: J. V. GluckSixt Quarterly Progress Report to Materials Laboratory, Wright Air Develpment Center Department of the Air Force on Intermediate Temperature Creep and Rupture Behavior of Titanium and Titanium Alloys
Author: J.V. GluckThe Effect of Grain Size on the Mechanical Properties of Titanium and Its Alloys
Author: Frank Charles HoldenPublisher:
ISBN:
Category : Titanium
Languages : en
Pages : 156
Book Description
Effect of Microstructure on the Room Temperature Tensile and Creep Deformation Mechanisms of Alpha-beta Titanium Alloys
Author: Creep, Fatigue, and Deformation of Alpha and Alpha-beta Titanium Alloys at Ambient Temperature
Author: Matt C. BrandesPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Abstract: Titanium and it alloys are extensively utilized in critical applications that require materials with high strength to weight ratios, rigidities, and toughnesses. This being the case, over 70 years of research have been devoted to the measurement, understanding, and tailoring of the mechanical properties of these alloys. Despite these efforts, surveys of the current knowledge base and understanding of the mechanical responses of Ti alloys demonstrate that numerous mechanical behaviors have yet to be investigated and explained. It has been noted, but generally not appreciated, that commercially important materials display modest strength differentials near room temperature when deformed under quasi-static loading conditions at modest rates (~10-5 to 10-3 1/s). Under static loading, subtle variations in plastic flow behavior leads to dramatically weaker materials when loaded in tension versus compression. The asymmetric material responses of single and two-phase alloys deformed under monotonic constant rate and creep conditions have been investigated and related to the fundamental slip behavior observed in single crystalline materials. Two-phase titanium alloys containing a majority volume fraction of the alpha (HCP) phase have long been known to undergo creep deformation at lower temperatures (T