Development and comparison of processing maps of Mg-3Sn-1Ca alloy from data obtained in tension versus compression

8th TSME-International Conference on Mechanical Engineering

Rao, K.P.^1 ; Suresh, K.^2 ; Prasad, Y.V.R.K.^3 ; Hort, N.^4

Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong^1

Department of Physics, Bharathiar University, Tamilnadu, Coimbatore

641046, India^2

Processingmaps.com, No. 2/B, Vinayaka Nagar, Hebbal, Bengaluru

560024, India^3

Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Magnesium Innovation Centre, Max-Planck-Straße 1, Geesthacht

21502, Germany^4

关键词: Flow stress data;    Grain-boundary self-diffusion;    Hot workability;    Mode of deformation;    Non basal slips;    Processing maps;    State of stress;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/297/1/012014/pdf
DOI  :  10.1088/1757-899X/297/1/012014

来源: IOP

【 摘 要 】

The hot workability of extruded Mg-3Sn-1Ca alloy has been evaluated by developing processing maps with flow stress data from compression and tensile tests with a view to find the effect of the applied state-of-stress. The processing maps developed at a strain of 0.2 are essentially similar irrespective of the mode of deformation - compression or tension, and exhibit three domains in the temperature ranges: (1) 350 - 425 °C, and (2) 450 - 550 °C and (3) 400 - 500 °C, the first two occurring at lower strain rates and the third occurring at higher strain rates. In all the three domains, dynamic recrystallization occurs and is caused by non-basal slip and controlled by lattice self-diffusion in the first and second domains and grain boundary self-diffusion in the third domain. The state-of-stress imposed on the specimen (compression or tension) does not have any significant effect on the processing maps.