Liyang Zeng , Jiazhi Zhang , Gan Li , Jie Li , Shuai Wang , Xiangyu Song , Jiacheng Xu , Jingchen Wang , Ying Li , Yonghua Rong , Xunwei Zuo , Nailu Chen , Jian Lu
{"title":"Ultrahigh fatigue strength of gradient nanostructured plain steel","authors":"Liyang Zeng , Jiazhi Zhang , Gan Li , Jie Li , Shuai Wang , Xiangyu Song , Jiacheng Xu , Jingchen Wang , Ying Li , Yonghua Rong , Xunwei Zuo , Nailu Chen , Jian Lu","doi":"10.1016/j.scriptamat.2024.116243","DOIUrl":null,"url":null,"abstract":"<div><p>In light of the steel development trend—plainification and high performance, we designed a gradient nanostructured plain steel with ultrahigh mechanical performance and exceptional cost performance. This multiscale design is achieved by using surface mechanical attrition treatment (SMAT) in a plain steel matrix subjected to quenching-partitioning-tempering (Q-P-T) process. The integration of Q-P-T and SMAT processes effectively achieves the gradient surface nanocrystallization on the high mechanical performance matrix. This gradient nanostructure exhibits an environment with gradient compressive stress accompanying with the refinement of grains, which prevent crack formation and propagation effectively. Consequently, an ultrahigh fatigue strength (up to 820 MPa) at high-cycle (10<sup>7</sup>) can be achieved with remarkable cost performance (1653.1 MPa·kg/USD) at the same time, surpassing maraging steel by 14 times. The multiscale design of gradient nanostructured plain steel not only breaks the endurance-cost trade-off but also paves the way to imparting significant endurance on high carbon plain steel.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-06-27","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/S1359646224002781","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In light of the steel development trend—plainification and high performance, we designed a gradient nanostructured plain steel with ultrahigh mechanical performance and exceptional cost performance. This multiscale design is achieved by using surface mechanical attrition treatment (SMAT) in a plain steel matrix subjected to quenching-partitioning-tempering (Q-P-T) process. The integration of Q-P-T and SMAT processes effectively achieves the gradient surface nanocrystallization on the high mechanical performance matrix. This gradient nanostructure exhibits an environment with gradient compressive stress accompanying with the refinement of grains, which prevent crack formation and propagation effectively. Consequently, an ultrahigh fatigue strength (up to 820 MPa) at high-cycle (107) can be achieved with remarkable cost performance (1653.1 MPa·kg/USD) at the same time, surpassing maraging steel by 14 times. The multiscale design of gradient nanostructured plain steel not only breaks the endurance-cost trade-off but also paves the way to imparting significant endurance on high carbon plain steel.
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.