Ti6Al4V合金的韧性及显微组织因素

M Niinomi, T Kobayashi, N Sasaki
{"title":"Ti6Al4V合金的韧性及显微组织因素","authors":"M Niinomi,&nbsp;T Kobayashi,&nbsp;N Sasaki","doi":"10.1016/0025-5416(88)90238-8","DOIUrl":null,"url":null,"abstract":"<div><p>The instrumented Charpy impact test, the dynamic fracture toughness test and the static fracture toughness test using the DC electrical potential method were carried out on Ti6Al4V alloys. Ti6Al4V alloys with various microstructures were used to investigate the relation between microstructural factors, including fractographic measurements, and various toughness criteria, i.e. Charpy absorbed energies (E<sub>t</sub>, total absorbed energy; E<sub>i</sub>, apparent crack initiation energy; E<sub>p</sub>, apparent crack propagation energy); dynamic fracture toughness J<sub>d</sub>; static fracture toughness (J<sub>Ic</sub> (EPM), by DC electrical potential method or K<sub>Q</sub>); static fracture propagation resistance curve (J<sub>R</sub> curve); and static tearing modulus T<sub>mat</sub>.</p><p>The toughness of the Ti6Al4V alloy as evaluated by the Charpy test was different from that given by the dynamic toughness test mainly because the microstructural unit which controlled the fracture was different in the different tests. The toughness evaluated by means of the J<sub>R</sub> curve or T<sub>mat</sub> does not always coincide with that given by J<sub>Ic</sub> (EPM). Therefore it is necessary to use an appropriate toughness criterion that corresponds to the method of design. It was found that the microstructure had a greater influence on T<sub>mat</sub> than on J<sub>Ic</sub> (EPM). In addition, the relationships between microstructural factors (i.e. the areal fraction of the primary α phase, the mean free path in the primary α, the depth of dimples, the prior β grain size) and the various toughness criteria mentioned above must be clearly defined.</p></div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1988-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90238-8","citationCount":"25","resultStr":"{\"title\":\"Toughness and microstructural factors of Ti6Al4V alloy\",\"authors\":\"M Niinomi,&nbsp;T Kobayashi,&nbsp;N Sasaki\",\"doi\":\"10.1016/0025-5416(88)90238-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The instrumented Charpy impact test, the dynamic fracture toughness test and the static fracture toughness test using the DC electrical potential method were carried out on Ti6Al4V alloys. Ti6Al4V alloys with various microstructures were used to investigate the relation between microstructural factors, including fractographic measurements, and various toughness criteria, i.e. Charpy absorbed energies (E<sub>t</sub>, total absorbed energy; E<sub>i</sub>, apparent crack initiation energy; E<sub>p</sub>, apparent crack propagation energy); dynamic fracture toughness J<sub>d</sub>; static fracture toughness (J<sub>Ic</sub> (EPM), by DC electrical potential method or K<sub>Q</sub>); static fracture propagation resistance curve (J<sub>R</sub> curve); and static tearing modulus T<sub>mat</sub>.</p><p>The toughness of the Ti6Al4V alloy as evaluated by the Charpy test was different from that given by the dynamic toughness test mainly because the microstructural unit which controlled the fracture was different in the different tests. The toughness evaluated by means of the J<sub>R</sub> curve or T<sub>mat</sub> does not always coincide with that given by J<sub>Ic</sub> (EPM). Therefore it is necessary to use an appropriate toughness criterion that corresponds to the method of design. It was found that the microstructure had a greater influence on T<sub>mat</sub> than on J<sub>Ic</sub> (EPM). In addition, the relationships between microstructural factors (i.e. the areal fraction of the primary α phase, the mean free path in the primary α, the depth of dimples, the prior β grain size) and the various toughness criteria mentioned above must be clearly defined.</p></div>\",\"PeriodicalId\":100890,\"journal\":{\"name\":\"Materials Science and Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1988-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0025-5416(88)90238-8\",\"citationCount\":\"25\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Science and Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0025541688902388\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0025541688902388","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 25

摘要

对Ti6Al4V合金进行了仪器夏比冲击试验、动态断裂韧性试验和直流电势法静态断裂韧性试验。采用不同显微组织的Ti6Al4V合金,研究了显微组织因素(断口形貌)与各种韧性指标(Charpy吸收能Et,总吸收能;Ei,表观裂纹起裂能;Ep,表观裂纹扩展能);动态断裂韧性Jd;静态断裂韧性(JIc (EPM),用直流电势法或KQ法计算);静态裂缝扩展阻力曲线(JR曲线);静态撕裂模量Tmat。Charpy试验对Ti6Al4V合金韧性的评价结果与动态韧性试验结果存在差异,主要原因是不同试验中控制断裂的组织单元不同。用JR曲线或Tmat计算的韧性与JIc (EPM)计算的结果并不总是一致的。因此,有必要采用与设计方法相适应的适当的韧性准则。发现微观结构对Tmat的影响大于对JIc (EPM)的影响。此外,微观组织因素(即初生α相的面积分数、初生α中的平均自由程、韧窝深度、β晶粒尺寸)与上述各种韧性标准之间的关系必须明确。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Toughness and microstructural factors of Ti6Al4V alloy

The instrumented Charpy impact test, the dynamic fracture toughness test and the static fracture toughness test using the DC electrical potential method were carried out on Ti6Al4V alloys. Ti6Al4V alloys with various microstructures were used to investigate the relation between microstructural factors, including fractographic measurements, and various toughness criteria, i.e. Charpy absorbed energies (Et, total absorbed energy; Ei, apparent crack initiation energy; Ep, apparent crack propagation energy); dynamic fracture toughness Jd; static fracture toughness (JIc (EPM), by DC electrical potential method or KQ); static fracture propagation resistance curve (JR curve); and static tearing modulus Tmat.

The toughness of the Ti6Al4V alloy as evaluated by the Charpy test was different from that given by the dynamic toughness test mainly because the microstructural unit which controlled the fracture was different in the different tests. The toughness evaluated by means of the JR curve or Tmat does not always coincide with that given by JIc (EPM). Therefore it is necessary to use an appropriate toughness criterion that corresponds to the method of design. It was found that the microstructure had a greater influence on Tmat than on JIc (EPM). In addition, the relationships between microstructural factors (i.e. the areal fraction of the primary α phase, the mean free path in the primary α, the depth of dimples, the prior β grain size) and the various toughness criteria mentioned above must be clearly defined.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信