{"title":"拉伸变形的TiNi形状记忆合金中B19 -马氏体的织构和热膨胀异常","authors":"V. Gundyrev, V. Zel’dovich, G. Sobyanina","doi":"10.1155/TSM.32.71","DOIUrl":null,"url":null,"abstract":"The dilatometric studies of Ti-50.5 at.% Ni alloy have shown that the thermal expansion \ncoefficient (TEC) of B19'-martensite varies considerably for the solution-treated and \ntensile-strained samples. In the undeformed state the TEC has the positive value \nα=9.7.10-6 K-1. After tensile straining the TEC decreases sharply and takes on a \nnegative value (down to – 10.8.10-6 K-1). The reasons for the variation of the TEC of the \nB19'-phase of the solution-treated and deformed samples are discussed. The tensile \nstraining was found to create in the samples an extremely sharp texture of the phase \ntransformation, with the texture axis parallel to the strain direction. The TEC of monoclinic \nB1939;-lattice is different in various crystallographic directions and assumes a negative \nvalue in the [0 01]B19' direction.","PeriodicalId":129427,"journal":{"name":"Textures and Microstructures","volume":"14 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"TEXTURE AND THERMAL EXPANSION ANOMALIES OF B19 -MARTENSITE IN TENSILE DEFORMED TiNi SHAPE MEMORY ALLOY\",\"authors\":\"V. Gundyrev, V. Zel’dovich, G. Sobyanina\",\"doi\":\"10.1155/TSM.32.71\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The dilatometric studies of Ti-50.5 at.% Ni alloy have shown that the thermal expansion \\ncoefficient (TEC) of B19'-martensite varies considerably for the solution-treated and \\ntensile-strained samples. In the undeformed state the TEC has the positive value \\nα=9.7.10-6 K-1. After tensile straining the TEC decreases sharply and takes on a \\nnegative value (down to – 10.8.10-6 K-1). The reasons for the variation of the TEC of the \\nB19'-phase of the solution-treated and deformed samples are discussed. The tensile \\nstraining was found to create in the samples an extremely sharp texture of the phase \\ntransformation, with the texture axis parallel to the strain direction. The TEC of monoclinic \\nB1939;-lattice is different in various crystallographic directions and assumes a negative \\nvalue in the [0 01]B19' direction.\",\"PeriodicalId\":129427,\"journal\":{\"name\":\"Textures and Microstructures\",\"volume\":\"14 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Textures and Microstructures\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1155/TSM.32.71\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Textures and Microstructures","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1155/TSM.32.71","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
TEXTURE AND THERMAL EXPANSION ANOMALIES OF B19 -MARTENSITE IN TENSILE DEFORMED TiNi SHAPE MEMORY ALLOY
The dilatometric studies of Ti-50.5 at.% Ni alloy have shown that the thermal expansion
coefficient (TEC) of B19'-martensite varies considerably for the solution-treated and
tensile-strained samples. In the undeformed state the TEC has the positive value
α=9.7.10-6 K-1. After tensile straining the TEC decreases sharply and takes on a
negative value (down to – 10.8.10-6 K-1). The reasons for the variation of the TEC of the
B19'-phase of the solution-treated and deformed samples are discussed. The tensile
straining was found to create in the samples an extremely sharp texture of the phase
transformation, with the texture axis parallel to the strain direction. The TEC of monoclinic
B1939;-lattice is different in various crystallographic directions and assumes a negative
value in the [0 01]B19' direction.