Microstructure and Properties of 316L Stainless Steel Fabricated by Gas Mental Arc Additive Manufacturing with Ultrasonic Vibration Treatment

被引：0
|
作者：
Yang D. [1 ]
Wang X. [1 ]
Peng Y. [1 ]
Zhou Q. [1 ]
Wang K. [1 ]
机构：
[1] Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing
来源：
Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 01期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
316L stainless steel; Mechanical property; Microstructure; Ultrasonic vibration treatment; Wire arc additive manufacture;
D O I：
10.11896/cldb.20120270
中图分类号：
学科分类号：
摘要：
The forming test of 316L stainless steel thin wall part was carried out with ultrasonic impact assisting gas metal arc additive manufacture (GMA-AM), and the influence of ultrasonic impact assist on the microstructure and properties of the part was comparatively studied. The results show that the microstructure of the wall part is composed of austenite and ferrite. After adding the ultrasonic vibration treatment in the additive manufacture process, the microstructure of the part is refined with the average grain size is 57.1% less than the grain of the un-impacted part; the content of ferrite is increased from 2.4% in the un-impacted part to 6.7% in the ultrasonic vibration treatment part. The hardness and tensile properties of the thin wall parts are improved, and the hardness of the sample is (182±8.9)HV which is 5.2% higher than that of the un-impacted parts. The tensile strength and elongation in the horizontal direction are (595±14.4) MPa and (44±6.8)%, respectively, and that in the vertical direction are (604±20.7) MPa and (36±3.4)%. © 2022, Materials Review Magazine. All right reserved.
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