The research of the influence different factors on micro-creep construction alloys
Experimental studies of the effect of loading rate, heat treatment, and unloading (full and partial) on the amount of micro-creep are performed. They showed that unloading is the most significant factor affecting the amount of microcreep. In particular, it was found that partial unloading (30% of the achieved stress level) leads to a significant reduction in the maximum microcreep strain in comparison with full unloading (up to 30 5 when testing alloys 01570 and AMg6). When conducting tests with preliminary unloading in the initial stage, the phenomenon of a time delay of the creep process (about 30-90 seconds) was detected. Moreover, in experiments with partial unloading, the delay interval is longer than in experiments with full.