Metallurgical Abstracts on Light Metals and Alloys vol.54
Peening Natural Aging of Aluminum Alloy by Ultra-High-Temperature and High-Pressure Cavitation
Toshihiko Yoshimura*, Masayoshi Iwamoto*, Takayuki Ogi*, Fumihiro Kato*, Masataka Ijiri** and Shoichi Kikuchi***
*Department of Mechanical Engineering, Sanyo-Onoda City University
**Department of Mechanical Systems Engineering, Tokyo Metropolitan University
***Department of Mechanical Engineering, Shizuoka University
[Published in Applied Sciences, Vol. 11 (2021), 2894 pp. 1–13]
https://doi.org/10.3390/app11072894
E-mail: yoshimura-t[at]rs.socu.ac.jp
Keywords: multifunction cavitation, water jet cavitation, ultrasonic cavitation, high-temperature high-pressure cavitation, peening natural aging, low-temperature low-pressure cavitation, peening aging
The peening solution treatment was performed on AC4CH aluminum alloy by ultra-high-temperature and high-pressure cavitation (UTPC) processing, and the peening natural aging was examined. Furthermore, peening artificial aging treatment by low-temperature and low-pressure cavitation (LTPC) was performed, and the time course of peening natural aging and peening artificial aging were compared and investigated. It was found that when the AC4CH alloy is processed for an appropriate time by UTPC processing, compressive residual stress is applied and natural aging occurs. In addition, the UTPC processing conditions for peening natural aging treatment with high compressive residual stress and surface hardness were clarified. After peening artificial aging by LTPC processing, the compressive residual stress decreases slightly over time, but the compression residual stress becomes constant by peening natural aging through UTPC treatment. In contrast, it was found that neither natural nor artificial peening natural aging occurs after processing for a short time.