Dissertation > Excellent graduate degree dissertation topics show

The Study on High Temperature Low Cycle Fatigue Properties and High Temperature Creep Properties of GH4169 Alloy

Author: SongXiaoGuo
Tutor: ShaoWenZhu
School: Harbin Institute of Technology
Course: Materials Science
Keywords: GH4169 alloy Temperature tensile High temperature low cycle fatigue Creep
CLC: TG115.57
Type: Master's thesis
Year: 2007
Downloads: 637
Quote: 4
Read: Download Dissertation

Abstract


In this paper, four different heat treatment by high temperature alloy GH4169 stretch, high temperature low cycle fatigue and high temperature creep behavior. Through trial tests, the heat treatment on the GH4169 alloy high-temperature tensile, high temperature low cycle fatigue and high temperature creep properties were investigated; using optical, SEM and TEM methods were analyzed grain size, δ phase content, γ \tensile test results showed that the smaller the grain size of the material its tensile strength, yield strength are larger than the grain size of the material; acicular grain boundary phase having a reduced δ GH4169 alloy high-temperature tensile strength; when grain size and δ phase content is constant, γ \, GH4169 alloy at elevated temperature tensile fracture mechanism of porous aggregates in the γ \GH4169 alloy at 600? C under different strain amplitude high temperature low cycle fatigue test results show that the grain size is relatively small, intragranular γ \presence reduces the fatigue life of the alloy at high temperature low cycle fatigue during cyclic softening; TEM analysis showed that the dislocations cutting γ \In addition, the region near the fracture TEM observation showed that, GH4169 alloy high temperature low cycle fatigue microscopic mechanism of dislocation slip; grain size decreases or the presence of needle-like δ phase slip band spacing narrower slip with density, γ \GH4169 alloy high creep rupture life; δ-phase alloys increased presence of high temperature creep rupture life. organization of the state's different lead alloy creep rupture mechanisms have some differences, that is, without significant δ phase precipitates and grain boundaries has needle δ phase precipitation creep crack initiation mechanisms are mechanisms and hole-shaped wedge mechanism; four kinds of organization of the state of the alloy creep crack growth mechanisms are extended along the grain and transgranular extended hybrid mechanism; needle δ phase presence in a certain extent, ease the stress concentration, improved creep elongation.

Related Dissertations

  1. A Study on Thermal-Mechanical Damage Behaviour of 60Si2Mn Steel,TG142.15
  2. Research on Adaptive Inverse Control for the Hysteresis and Creep Characteristics of IPMC,TP273.2
  3. GH4169G alloy creep behavior of the organizational structure and,TG146
  4. Lead-free solder joints under shear tensile creep resistance strain relations with research,O348.2
  5. Varying analysis considering shear lag effects of variable cross-section PC cantilever box girder,U448.213
  6. Lacustrine soft soil physical and mechanical properties and the creep characteristics of,U212.22
  7. Evaluation of Films Creep Deformation Property by Laser Thermal Stress Method and Simulation of Finite Element,TN249
  8. Study on the Microstructure and Properties of 1Cr10NiMoW2VNbN Steel Used for Ultra-Supercritical Gas Turbine,TG142.1
  9. Concrete Creep Reseach of the Composite Beam after Considering Shear Slip,TU398.9
  10. The Analysis of Subgrade Settlement after Construction Considering Rheology in Soft Soil Area,U213.1
  11. Calculation of the Differential Shortening and Internal Force for Frame-reinforced Concrete Core-wall Structure Based on Jiang Dong Project,TU973.17
  12. Simulation of thermal stress of roller compacted concrete gravity dam,TV315
  13. Approach of Life Prediction under Cyclic Creep,O344.6
  14. Simulation Analysis of Prestressed Concrete Continuous Rigid Frame Bridge,U445.4
  15. Experimental Study on Creep Characteristics of Deep Surrounding-Rock,TU452
  16. Reliability Study on Creep Property in High Temperature of GH36 Steel,TG142.33
  17. Gasket Creep Performance of Flanged Bolted Connection System,TH136
  18. Fatigue Test and Simulation Analysis for Improved Soil Subgrade under the Ballastless Tracks of High-speed Railway,U213.1
  19. Long-term performance of steel - concrete composite box girder,TU398.9
  20. Effect of Neodymium and Heat Treatment on Microstructure and Properties of Al2O3f/Mg-9Al Composites,TG146.22
  21. Study on Fracture Behaviour and High Temperature Mechanical Properties of TiB2P/6061Al Composite,TB331

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallurgy ( Physical Metallurgy ) > Analytical tests of the metal (Metal Testing and Materials ) > Mechanical properties ( mechanical properties ) test > Fatigue and creep tests , the fracture toughness test
© 2012 www.DissertationTopic.Net  Mobile