Accelerated age hardening response by in-situ ultrasonic aging of a WE43 alloy

作者：Palanivel S; Mishra R S^*; Brennan R E; Cho K C

来源：Materials and Manufacturing Processes, 2018, 33(1): 104-108.

DOI：10.1080/10426914.2016.1221094

• Aging
• alloys
• diffusion
• magnesium
• mechanical
• precipitation
• properties
• Ultrasonic

Custom built in-situ ultrasonic aging equipment was used to investigate the precipitation hardening response in a commercial WE43 alloy at 210 degrees C. Three power levels (100, 300, 400 W) with time intervals of 15, 30, and 60 s between sonication were used to measure the change in hardness. Aging response was 24 times faster, decreasing the time to achieve peak hardness from 48 hrs during conventional aging to 2 hrs under the influence of ultrasonic waves. While higher power increased the peak hardness, shortening the interval time from 30 to 15 s did not have any influence. Transmission electron micrographs revealed well-developed beta(1) variants in as little as 15 minutes for ultrasonically aged samples, which was the reason for enhanced age hardening response.

• 出版日期2018