Nondestructive Evaluation on Hydrogen Effect of 316 L Stainless Steel

作者：Bae Dongsu; Lee JinKyung; Lee Sangpill; Jung Kyonguk; Hwang Seongguk; Lee JoonHyun

来源：International Journal of Precision Engineering and Manufacturing - Green Technology, 2016, 3(1): 99-103.

DOI：10.1007/s40684-016-0013-7

• Nondestructive technique
• Hydrogen embrittlement
• Ultrasonic wave
• Acoustic emission
• AE parameter

A stainless steel material is used as components for storing hydrogen gas and liquid hydrogen, or for transportation raw material and oil in storage container Brittle fracture associated with hydrogen is observed for stainless steel and these phenomena of hydrogen embrittlement were very important for wide-ranging application of stainless steel. Many researchers have studied the hydrogen embrittlement from the mechanical and metallographic point of views. The aim of this study is to identify the material degradation by hydrogen embrittlement for 316L stainless steel using nondestructive evaluation. That is, the relationship between the mechanical properties of 3I6L stainless steel by hydrogen charging and nondestructive technique of acoustic emission technique and an ultrasonic wave is to be clarified The relationship between fractography and ultrasonic wave characteristics on hydrogen charged material for Ohr and 24hr was discussed. SEM and optical microscope were used to inspect the fracture surface of hydrogen charged material. The fracture surface of the charged specimen became brittle, especially on the surface nearby AE parameters of event, count, energy, amplitude and frequency were analyzed according to the degree of the damage of hydrogen charged stainless steel.

• 出版日期2016-1