Flow behavior and dynamic softening mechanism of Pt−10Ir precious alloy

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-01-01 DOI:10.1016/S1003-6326(24)66676-8

Xin-pei ZHANG , Jun-jie HE , Lin PI , Quan FU , Wen-yan ZHOU , Jun CHENG , Sheng-wen BAI , Xuan ZHOU , Yi LIU , Yong MAO

{"title":"Flow behavior and dynamic softening mechanism of Pt−10Ir precious alloy","authors":"Xin-pei ZHANG , Jun-jie HE , Lin PI , Quan FU , Wen-yan ZHOU , Jun CHENG , Sheng-wen BAI , Xuan ZHOU , Yi LIU , Yong MAO","doi":"10.1016/S1003-6326(24)66676-8","DOIUrl":null,"url":null,"abstract":"<div><div>The hot deformation behavior of Pt−10Ir alloy was studied under a wide range of deformation parameters. At a low deformation temperature (950−1150 °C), the softening mechanism is primarily dynamic recovery. In addition, dynamic recrystallization by progressive lattice rotation near grain boundaries (DRX by LRGBs) and microshear bands assisted dynamic recrystallization (MSBs assisted DRX) coordinate the deformation. However, it is difficult for the dynamic softening to offset the stain hardening due to a limited amount of DRXed grains. At a high deformation temperature (1250−1350 °C), three main DRX mechanisms associated with strain rates occur: DRX by LRGBs, DRX by a homogeneous increase in misorientation (HIM) and geometric DRX (GDRX). With increasing strain, DRX by LRGBs is enhanced gradually under high strain rates; the “pinch-off” effect is enhanced at low strain rates, which was conducive to the formation of a uniform and fine microstructure.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 1","pages":"Pages 225-242"},"PeriodicalIF":4.7000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624666768","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

The hot deformation behavior of Pt−10Ir alloy was studied under a wide range of deformation parameters. At a low deformation temperature (950−1150 °C), the softening mechanism is primarily dynamic recovery. In addition, dynamic recrystallization by progressive lattice rotation near grain boundaries (DRX by LRGBs) and microshear bands assisted dynamic recrystallization (MSBs assisted DRX) coordinate the deformation. However, it is difficult for the dynamic softening to offset the stain hardening due to a limited amount of DRXed grains. At a high deformation temperature (1250−1350 °C), three main DRX mechanisms associated with strain rates occur: DRX by LRGBs, DRX by a homogeneous increase in misorientation (HIM) and geometric DRX (GDRX). With increasing strain, DRX by LRGBs is enhanced gradually under high strain rates; the “pinch-off” effect is enhanced at low strain rates, which was conducive to the formation of a uniform and fine microstructure.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.