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| AN INVESTIGATION ON THE RESISTANCE TO PLASTIC DEFORMATION OF MILD STEEL,13% CHROMIUM STEEL,ALUMINIUM AND LEAD AT DIFFERENT TEMPERATURES AND AT VARIOUS RATES OF STRAIN |
| CHANG TSO-MEI;CHAO SHIH-TA Institute of Optics & Fine Mechanics;Academia Sinica |
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Cite this article:
CHANG TSO-MEI;CHAO SHIH-TA Institute of Optics & Fine Mechanics;Academia Sinica. AN INVESTIGATION ON THE RESISTANCE TO PLASTIC DEFORMATION OF MILD STEEL,13% CHROMIUM STEEL,ALUMINIUM AND LEAD AT DIFFERENT TEMPERATURES AND AT VARIOUS RATES OF STRAIN. Acta Metall Sin, 1963, 6(2): 131-145.
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Abstract Homogeneous compression tests were carried out in a cam plastometer on mild steel,13% chromium steel,aluminium and lead.Aluminium and lead were tested at roomtemperatures;while mild steel and 13% chromium steel were tested at 1000,1100 and1200℃.Altogether five different rates of strain were used,ranging from 12.2 sec.~(-1)to 183 sec.~(-1),the rate of strain being kept constant during the test.With the exceptionof lead,which reached a reduction of 76%,the maximum reduction in height was 56%.During the tests,the testing temperatures were controlled accurately.The friction be-tween the specimen and the compression platens was successfully eliminated,so that testswere carried out under homogeneous compression conditions,and the true stress-straincurves corresponding to the above testing conditions were thus obtained.The experimental results show that under the above testing conditions the relation-ship between the rate of strain and the resistance to deformation for mild steel,13%chromium steel and lead obeys the following law(?)while the stress-strain curves for aluminium is practically unaffected by the change in theabove rates of strain.These experimental results have been discussed and compared withprevious work found in literature.
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Received: 18 February 1963
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