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应力作用下Ti2448合金单晶微观结构演变的透射电子显微学研究
  • ISSN号：1000-6281
  • 期刊名称：《电子显微学报》
  • 时间：0
  • 分类：TG146.21[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学] TG115.215.3[金属学及工艺—物理冶金;金属学及工艺—金属学]
  • 作者机构：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,辽宁沈阳110016, [2]北京工业大学固体微结构与性能研究所,北京100124
  • 相关基金：教育部长江学者奖励计划,国家自然科学基金资助项目（Nos.51071152,50901080,51271180）; 国家重点基础研究发展计划资助项目（Nos.2012CB933901,2012CB619103,2012CB933902）
作者： 张家伟[1], 郝玉琳[1], 隋曼龄[2]
关键词： Ti2448单晶, 原位拉伸, 相变, moiré条纹, Ti2448 single crystals, in situ tensile test, phase transformation, moire fringe
中文摘要：

利用透射电镜原位拉伸技术研究了Ti2448单晶合金微观结构的演变,观察到应力诱发β→α″马氏体相变与应力诱发β→ω相变。严重塑性变形后裂纹附近α″马氏体相晶粒尺寸为几～几十纳米,弥散地分布在β基体上。在应力加载状态下应力诱发的ω相呈现几个纳米大小的两个变体。原位塑性变形过程中观察到的纳米尺度moiré条纹区域是由均匀形核的位错所形成。

英文摘要：

The mierostructure evolution of Ti2448 single crystals were investigated by in situ TEM tensile analysis. The results showed that the stress-induced α＂ martensitie transformation and stress-induced to phase transformation were observed. Nanometer-sized α＂ martensite particles were dispersively distributed in β matrix around a crack after severe deformation. High resolution TEM image indicated that two nanometer-sized variants of to phase were formed during in situ tensile tests. Nanometer-sized molte fringes were formed by homogeneously nucleated dislocations during deformation.

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期刊信息
  • 《电子显微学报》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国物理学会
  • 主编：张 泽
  • 地址：北京市海淀区中关村北二条13号5号楼301
  • 邮编：100190
  • 邮箱：dzxwxb@blem.ac.cn
  • 电话：010-82671519 62565522/3301
  • 国际标准刊号：ISSN：1000-6281
  • 国内统一刊号：ISSN：11-2295/TN
  • 邮发代号:
  • 获奖情况:
  • 曾获《中国科技论文统计源期刊（中国科技核心期刊）》,《中国科学引文数据库(核心库)》来源期刊,中国自然科学核心期刊（无线电电子学、电信技术类...
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,英国科学文摘数据库,中国中国科技核心期刊,中国北大核心期刊（2008版）,中国北大核心期刊（2000版）
  • 被引量:6569