High temperature deformation mechanisms and processing map for hot working of cast-homogenized Mg-3Sn-2Ca alloy

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

  • K. P. Rao
  • Y. V.R.K. Prasad
  • N. Hort
  • K. U. Kainer

The hot working behavior of Mg-3Sn-2Ca alloy has been investigated in the temperature range 300-500 °C and strain rate range 0.0003-10 s-1, with a view to evaluate the mechanisms and optimum parameters of hot working. For this purpose, a processing map has been developed on the basis of the flow stress data obtained from compression tests. The stress-strain curves exhibited steady state behavior at strain rates lower than 0.01 s-1 and at temperatures higher than 350 °C and flow softening occurred at higher strain rates. The processing map exhibited two dynamic recrystallization domains in the temperature and strain rate ranges: (1) 300-420 °C and 0.0003-0.003 s-1, and (2) 420-500 °C and 0.003-1.0 s-1, the latter one being useful for commercial hot working. Kinetic analysis yielded apparent activation energy values of 161 and 175 kJ/mole in domains (1) and (2) respectively. These values are higher than that for self-diffusion in magnesium suggesting that the large volume fraction of intermetallic particles CaMgSn present in the matrix generates considerable back stress. The processing map reveals a wide regime of flow instability which gets reduced with increase in temperature or decrease in strain rate.

Original languageEnglish
Title of host publicationTHERMEC 2009
EditorsTara Chandra, N. Wanderka, Walter Reimers, M. Ionescu
Number of pages6
PublisherTrans Tech Publications Ltd
Publication date2010
Pages3616-3621
ISBN (print)0878492941, 9780878492947
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany
Duration: 25.08.200929.08.2009
Conference number: 6

    Research areas

  • Dynamic recrystallization, Hot workability, Kinetic analysis, Mg-Sn-Ca alloy, Processing map
  • Engineering

Recently viewed

Publications

  1. Assessing pre-travel online destination experience values of destination websites
  2. Analysis of life cycle datasets for the material gold
  3. Using Long-Duration Static Stretch Training to Counteract Strength and Flexibility Deficits in Moderately Trained Participants
  4. Compression behavior of typical silicone rubbers for soft robotics applications at elevated temperatures
  5. Exploring intrinsic, instrumental and relational values for sustainable management of social-ecological systems
  6. Intra-firm Wage Compression and Cost Coverage of Training
  7. Using a Bivariate Polynomial in an EKF for State and Inductance Estimations in the Presence of Saturation Effects to Adaptively Control a PMSM
  8. Combination of a reduced order state observer and an Extended Kalman Filter for Peltier cells
  9. Improving Flood Forecasting in a Developing Country
  10. A transfer operator based numerical investigation of coherent structures in three-dimensional Southern ocean circulation
  11. Investigation of the Controllability of Inductive Power Transmission Systems based on Flexible Coils
  12. Confidence levels and likelihood terms in IPCC reports
  13. Optimal scheduling for Automated Guided Vehicles (AGV) in blocking job-shops
  14. Natural enemy diversity reduces temporal variability in wasp but not bee parasitism
  15. Unusual two‐bond 13C, 13C coupling constants in sulphones
  16. Elastomeric Prepregs for Soft Robotics Applications
  17. Predicting the future performance of soccer players
  18. Open Innovation in Schools
  19. Testing for a break in the persistence in yield spreads of EMU government bonds
  20. CubeQA—question answering on RDF data cubes
  21. Fluorometer controlled apparatus designed for long-duration algal-feeding experiments and environmental effect studies with mussels
  22. Careless responding detection revisited
  23. Selecting methods for ecosystem service assessment
  24. Integrated simulation method for investment decisions of micro production systems
  25. A duty-block network approach for an integrated driver rostering problem in public bus transport
  26. Diversity promotes temporal stability across levels of ecosystem organization in experimental grasslands
  27. Reduction of springback by use of deep drawing tools with locally and temporally varying stiffness