Effects of annealing parameters on grain-growth behavior of HAYNES-718 superalloy

International Journal of Physical Sciences

Zainul Huda¹ 

关键词: Superalloy;    grain growth;    kinetics;    microstructure;    gas-turbines.;   

DOI  :  10.5897/IJPS11.245

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

Annealing heat-treatment experiments at temperatures in the range of 1050 to 1150°C (1323 to 1423K) for durations in the range of 20 min to 22 h were conducted for HAYNESÒ718 superalloy plate. Grain sizes for the as-received and the annealed samples of the superalloy were measured by application of quantitative metallographic techniques. The grain-growth exponents,n, for the kinetic relationship (dD/dt = ktn) were then computed, and thenvalues were found to lie in the range of 0.067 to 0.183. The microstructures of the as-received and annealed samples were critically compared for applications of the superalloy at high temperatures.

【 授权许可】

CC BY