The effect of grain size on the tensile properties of high-purity molybdenum at room temperature
- 1 February 1959
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 4 (38) , 194-199
- https://doi.org/10.1080/14786435908243256
Abstract
The room temperature yield end fracture stresses have been measured for a series of high-purity polycrystalline molybdenum tensile specimens with grain diameters varying from 0.03 mm to 0.26 mm. The yield stress results can be fitted to Petch's relation [sgrave]Y =[sgrave]I+kYl−1/2 with [sgrave]I= = 11.00 kg mm−l and kY= 1.7 × 102 dyne cm−22/2. The fracture stress curve tends to a constants height above the yield stress curve as the grain ah decreases. Using a theory of fracture recently proposed by Cottrell the effective surface energy for fracture in estimated to be 12 000 ergs cm−2.Keywords
This publication has 0 references indexed in Scilit: