Bin Hu , Shiji Geng , Nima Babaei , Alexander Gramlich , Yichao Bai , Wenting Zhao , Junkui Li , Xinjun Sun , Caijun Zhang , Ulrich Krupp , Haiwen Luo
{"title":"Fully restoring the damaged ductility of H-charged medium Mn steel via pulsed current","authors":"Bin Hu , Shiji Geng , Nima Babaei , Alexander Gramlich , Yichao Bai , Wenting Zhao , Junkui Li , Xinjun Sun , Caijun Zhang , Ulrich Krupp , Haiwen Luo","doi":"10.1016/j.scriptamat.2025.116663","DOIUrl":null,"url":null,"abstract":"<div><div>It was found that the electric pulsed treatment (EPT) performed at 250 °C on a medium Mn steel (MMnS) can remove all the H atoms preserved in martensite and austenite by the electrochemical H-charging; as a result, the severely deteriorated ductility and strength due to hydrogen embrittlement (HE) were both fully restored. In contrast, only the H-atoms in martensite were completely removed by the conventional heat treatment (CHT) at the same temperature, but 0.3 wt ppm H remained in austenite, resulting in the damaged ductility just restored by about 50 %. The relevant mechanism on releasing H-atoms by EPT is discussed on the basis of microstructural examinations and H-desorption kinetic measurements for explaining such an unexpected phenomenon.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"262 ","pages":"Article 116663"},"PeriodicalIF":5.6000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359646225001265","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/26 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
It was found that the electric pulsed treatment (EPT) performed at 250 °C on a medium Mn steel (MMnS) can remove all the H atoms preserved in martensite and austenite by the electrochemical H-charging; as a result, the severely deteriorated ductility and strength due to hydrogen embrittlement (HE) were both fully restored. In contrast, only the H-atoms in martensite were completely removed by the conventional heat treatment (CHT) at the same temperature, but 0.3 wt ppm H remained in austenite, resulting in the damaged ductility just restored by about 50 %. The relevant mechanism on releasing H-atoms by EPT is discussed on the basis of microstructural examinations and H-desorption kinetic measurements for explaining such an unexpected phenomenon.
期刊介绍：
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
