Microstructural and Textural Evolution in Heat Treated Zr-2.5% Nb Pressure Tube Material Subjected to Dilatometric Studies

Autor: Dinesh Srivastava, E. Ramadasan, Indradev Samajdar, Suman Neogy, Gautam Kumar Dey, K.V. Manikrishna, S. Anatharaman, B. N. Rath, N. Saibaba, R.V. Kulkarni
Rok vydání: 2011
Předmět:
Zdroj: Transactions of the Indian Institute of Metals. 64:395-399
ISSN: 0975-1645
0972-2815
DOI: 10.1007/s12666-011-0104-7
Popis: β-transus boundary for the Zr-2.5%Nb alloy containing 1137 ppmw of O and 650 ppmw of Fe was established using quenching dilatometry technique. The solid cylindrical samples of the alloy were β homogenised at 1063°C and then quenched at different rates between 0.06 and 200°C/s using the quenching dilatometer. The cooling part of the dilatograms were analysed to establish continuous cooling β transus boundary. Based on this β transus boundary heat treatment experiments were carried out on the alloy samples by holding at temperatures 883, 870, 863, 840°C in the α + βZr phase field and then quenching at different rates between 0.5 and 100°C/s to study the microstructural evolution and textural changes using electron microscopy techniques. An attempt has been made to correlate the transformation characteristics with the dilatograms recorded and the microstructural and textural changes have been ascertained.
Databáze: OpenAIRE
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