{"title":"NiTi合金重载高速耐磨性超弹性与硬度权衡评价","authors":"Zhongxiong Kang, Deyin Kong, Chaorui Jiang, Mengqi Liu, Zhihui Zhang, Jie Zhao","doi":"10.1016/j.wear.2025.205732","DOIUrl":null,"url":null,"abstract":"<div><div>NiTi alloy fabricated by laser directed energy deposition (LDED) have gained widely attention in tribological applications. But the interplay effects of between superelasticity and hardness on the wear resistance are not clarified clearly. In this work, six NiTi sample with various superelasticity and hardness are fabricated using LDED to analyze the trade–off between the conflicting factors of superelasticity and hardness in terms of wear resistance under heavy load and high–speed condition. The ball–on–flat dry reciprocating sliding wear test are conducted on NiTi samples against an alumina ball. The result indicated that all samples are exhibited superelasticity of 17.6%–29.9 % and mean microhardness of 345–416HV<sub>0.5</sub>. Importantly, the effects on wear resistance obey the following rules: superelasticity > synergistic enhancement of superelasticity and hardness > hardness > superelasticity and hardness mutually restricted. Additionally, the wear resistance mechanism is discussed in depth via wear morphology and acoustic emission signal.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"564 ","pages":"Article 205732"},"PeriodicalIF":7.2000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evalution of trade–off between superelasticity and hardness of NiTi alloy regarding wear resistance under heavy load and high–speed\",\"authors\":\"Zhongxiong Kang, Deyin Kong, Chaorui Jiang, Mengqi Liu, Zhihui Zhang, Jie Zhao\",\"doi\":\"10.1016/j.wear.2025.205732\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>NiTi alloy fabricated by laser directed energy deposition (LDED) have gained widely attention in tribological applications. But the interplay effects of between superelasticity and hardness on the wear resistance are not clarified clearly. In this work, six NiTi sample with various superelasticity and hardness are fabricated using LDED to analyze the trade–off between the conflicting factors of superelasticity and hardness in terms of wear resistance under heavy load and high–speed condition. The ball–on–flat dry reciprocating sliding wear test are conducted on NiTi samples against an alumina ball. The result indicated that all samples are exhibited superelasticity of 17.6%–29.9 % and mean microhardness of 345–416HV<sub>0.5</sub>. Importantly, the effects on wear resistance obey the following rules: superelasticity > synergistic enhancement of superelasticity and hardness > hardness > superelasticity and hardness mutually restricted. Additionally, the wear resistance mechanism is discussed in depth via wear morphology and acoustic emission signal.</div></div>\",\"PeriodicalId\":23970,\"journal\":{\"name\":\"Wear\",\"volume\":\"564 \",\"pages\":\"Article 205732\"},\"PeriodicalIF\":7.2000,\"publicationDate\":\"2025-03-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Wear\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0043164825000018\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/2 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wear","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043164825000018","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/2 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Evalution of trade–off between superelasticity and hardness of NiTi alloy regarding wear resistance under heavy load and high–speed
NiTi alloy fabricated by laser directed energy deposition (LDED) have gained widely attention in tribological applications. But the interplay effects of between superelasticity and hardness on the wear resistance are not clarified clearly. In this work, six NiTi sample with various superelasticity and hardness are fabricated using LDED to analyze the trade–off between the conflicting factors of superelasticity and hardness in terms of wear resistance under heavy load and high–speed condition. The ball–on–flat dry reciprocating sliding wear test are conducted on NiTi samples against an alumina ball. The result indicated that all samples are exhibited superelasticity of 17.6%–29.9 % and mean microhardness of 345–416HV0.5. Importantly, the effects on wear resistance obey the following rules: superelasticity > synergistic enhancement of superelasticity and hardness > hardness > superelasticity and hardness mutually restricted. Additionally, the wear resistance mechanism is discussed in depth via wear morphology and acoustic emission signal.
期刊介绍：
Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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