XRD线形傅氏分析方法研究TA15合金热压缩变形后的位错  

Research on Dislocations for Hot Compressively Deformed TA15 Alloy by X-ray Diffraction Method and a Profile Analysis Theory

作　　者：刘勇[1] 朱景川[1] 王洋[1] 占家军[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2008年第9期1505-1509,共5页Rare Metal Materials and Engineering

摘　　要：利用XRD线形傅氏分析方法定量分析TA15合金在750、800和925℃热压缩变形后的位错亚结构。结果表明：利用XRD线性傅氏分析的方法可以比较方便地定量表征位错信息：位错类型主要为基面（0002）、柱面（1010）和锥面（1011）型位错。存750℃、1s^-1变形条件下，随应变量的增加，直到60％变形量时，位错密度仍在增加。而在800℃、1s^-1变形条件下，位错密度先增加后降低。各变形条件下位错密度均在10^10-10^11cm^-2的范围；750℃变形后，各晶面的位错密度随应变量增加而增加，但是基面（0002）和锥面（1011）位错随应变量的增加的速度更快，说明此温度下基面和锥面位错更易滑移；800℃变形后锥面位错密度随着应变量增加稍有增加，而柱面（1010）和基面（0002）的变化很大。The dislocation sub-structures for TA 15 alloy by hot-compressive deformation were analyzed quantitatively by X-ray diffraction method and a profile analysis theory. The results showed that it is convenient to analyze dislocation by X-ray diffraction method and a profile analysis theory; The primary dislocations constitute of （0002）, （1010） and （1011 ） type for deformed TA15 alloy. Dislocation density increases with increasing strain up to 60% at the deformation temperature of 750 ℃ and strain rate of 1s^-1, while increases first followed by decreases under the condition of 800℃ and 1 sl. And the dislocation density falls into the range of 10^10-10^11cm^-2 for all deformation condition. All types of dislocations show an increase in densities, especially （0002） and （10 11 ）type dislocation at 750 ℃, suggesting that （0002） and （10 11 ） type dislocations are easy to operate at this temperature. And （1010） and （0002） type dislocations present a sharper change than that of （1011 ） type dislocations at 800 ℃.

关 键 词：TA15合金 热压缩变形 XRD线性傅氏分析方法 位错 

分 类 号：TG146.23[一般工业技术—材料科学与工程]