TRANSFORMATION PLASTICITY IN Sn-5 WT% Cd ALLOY.

被引：0
|
作者：
Sodhi, M.M. [1 ]
Murty, G.S. [1 ]
Vaidya, M.L. [1 ]
机构：
[1] Indian Inst of Technology, Dep of, Metallurgical Engineering, Kanpur,, India, Indian Inst of Technology, Dep of Metallurgical Engineering, Kanpur, India
来源：
Transactions of the Indian Institute of Metals | 1981年 / 36卷 / 4-5期
关键词：
METALS TESTING - Creep - TIN METALLOGRAPHY - Transformations;
D O I：
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学科分类号：
摘要：
Transformation plasticity effects were studied in the alloy while undergoing eutectoid transformation above 133 degree C. Isothermal tension, compression, creep and repeated tension tests were carried out with or without concurrent transformation. Transformation reduces the flow stress for deformation, and tensile ductility is enhanced by 10 to 25 pct depending on the rate of straining. The tensile ductility is increased two-fold by repeated straining through the transformation range but it still falls short of the superplastic range ( greater than 300 pct) because of intercrystalline fracture. Creep rate is enhanced due to concurrent transformation. The activation energy for creep is reduced by transformation. Excess creep strain due to transformation varies linearly with stress. The results are interpreted in terms of a modified Nabarro-Herring viscous creep model where the lattice diffusion activation energy is replaced by the value of the activation energy.
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页码：321 / 326
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