Dissertation > Excellent graduate degree dissertation topics show

The Study on Dynamic Fracture Toughness of 12Cr1MoV Steel

Author: LiuAiHui
Tutor: WangLiPing
School: Harbin University of Science and Technology
Course: Materials Processing Engineering
Keywords: 12Cr1MoV low-alloy steel Dynamic fracture toughness Estimate
CLC: TG115
Type: Master's thesis
Year: 2004
Downloads: 244
Quote: 1
Read: Download Dissertation


In this paper, the instrumented impact test , impact toughness 12Cr1MoV steel at a constant temperature of 540 ℃ variation with the holding time . The results show that : the impact absorbed energy curve under the platform with the holding time, the impact on the platform of the absorbed energy curve , the ductile-brittle transition temperature changes . Holding time is less than 500h , the increase in the ductile-brittle transition temperature (DBTT) increased brittleness ; 500h holding time , the the DBTT highest , brittle ; holding time is greater than 500h , DBTT decline reduce brittleness , toughness automatic recovery . Dynamic fracture toughness of the 12Cr1MoV steel thermostat 500h Hopkinson pressure bar test system , was to the dynamic fracture toughness 12Cr1MoV steel - temperature curve . The curve has the ductile-brittle transition trend of the curve on the platform area, the ductile-brittle transition transition zone under the platform area . The dynamic fracture toughness - temperature curve instrumented impact test impact energy - temperature curve of the trend of the two curves are basically the same , but the dynamic fracture toughness of the steel 12Cr1MoV - temperature curve than the impact energy - temperature curves are translated to the high temperature zone . The instrumented impact the results of the experiment , to combine empirical formula to estimate the dynamic fracture toughness of 12Cr1MoV steel holding time changes with temperature and time . The estimated results show that : compared to the dynamic fracture toughness - temperature curve of the impact energy - temperature curve 12Cr1MoV steel pan to the high temperature zone all hold time trend . And to estimate the dynamic fracture toughness curve and 12Cr1MoV steel non-equilibrium grain boundary segregation kinetics experimental curve fit well . Therefore , the estimates used in the empirical formula has important application value .

Related Dissertations

  1. Engineering Design on the Treatment and Reuse of Coal Mine Drainage,X752
  2. Research on Cement Concrete Overlay Stress Analysis and Cracking Prediction in the Rubblization of Old Cement Concrete Pavement,U416.216
  3. Research on Activity-Based Cost Estimation of Marine Engineering Equipment Products Based on BOM,F406.72
  4. HN CCB the Provident Fund extract repayment project cost management research,F832.4
  5. Perturbation Analysis of Moore-Penrose Metric Generalized Inverse of Linear Operators in Banach Space,O177.2
  6. Research on the Admissible Quadratic Error Variance Estimations in Growth Curve Model, and on the Admissibility of Quadratic Estimations with Restricted Parameter Sets,O212.1
  7. The Parameter Estimation of Linear Mixed Model,O212.1
  8. A Study on Quasi-linear Elliptic Equation,O175.25
  9. A Study on the Development of Low-carbon Economy of Wuhan,F205
  10. Environmental Risk Estimate of Structure and Appliance in Formaldehyde Industry,X820.4
  11. Shouqin Material Cost Control Research on Management Information,F270.7
  12. The Status Analysis and Planning Scheme Research of the Baotou Power Grid,TM715
  13. Research on Project Planning of Tianjin Zhigu Culture Center,G127
  14. Based on Parzen Window estimation and Renyi \\ 's dynamic random entropy of distributed control system output,TP13
  15. Research on Dynamics Finite Element Analysis and Testing Method of Dynamic Fracture Toughness Test System of Central Cracked Circular Disk Specimen of Rock,O346.1
  16. Testing Hereoscedasticity in Varying-coefficient Models,O212.1
  17. The Research of Images Compression Algorithm Based on Embedded Codec,TP391.41
  18. Heating Technique for High Temperatures Pressure Impact of Rock,TU458
  19. Jiangsu Express the Hongqiao center construction project feasibility analysis,F293.3
  20. A Priori and a Posteriori Error Estimates for Boundary Control,O241.82
  21. Study on Assets Evaluation of Forest Resources in Lishugou Forest,F326.2

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallurgy ( Physical Metallurgy ) > Analytical tests of the metal (Metal Testing and Materials )
© 2012 www.DissertationTopic.Net  Mobile