Ultrafine-grained microstructures evolving during severe plastic deformation

被引:26
作者
Ungár, T [1 ]
Alexandrov, I [1 ]
Zehetbauer, M [1 ]
机构
[1] Eotvos Lorand Univ, Dept Gen Phys, H-1518 Budapest, Hungary
来源
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY | 2000年 / 52卷 / 04期
关键词
D O I
10.1007/s11837-000-0129-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The microstructures of ultrafine-grained nanostructured materials developed by severe plastic deformation are widely varied in their grain size and grain-size distribution; grain boundaries and their structures; lattice defects, especially dislocations; point defects; and impurities. All of these features can be influence by the way severe plastic deformation is applied, and thereby have decisive effects on the physical and mechanical properties of the material. Probably, the most important factors determining microstructure are the imposed stress tensor, the degree and rate of strain, the temperature of deformation, the chemical composition of the deformed material, and the type of crystal lattice, showing that in order to develop specific properties, it is crucial to understand and optimize the microstructure.
引用
收藏
页码:34 / 36
页数:3
相关论文
共 51 条
[21]   X-RAY-DIFFRACTION LINE BROADENING DUE TO DISLOCATIONS IN NON-CUBIC CRYSTALLINE MATERIALS .3. EXPERIMENTAL RESULTS FOR PLASTICALLY DEFORMED ZIRCONIUM [J].
KUZEL, R ;
KLIMANEK, P .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1989, 22 :299-307
[22]   LONG-RANGE INTERNAL-STRESSES AND ASYMMETRIC X-RAY LINE-BROADENING IN TENSILE-DEFORMED [001]-ORIENTATED COPPER SINGLE-CRYSTALS [J].
MUGHRABI, H ;
UNGAR, T ;
KIENLE, W ;
WILKENS, M .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1986, 53 (06) :793-813
[23]   DISLOCATION WALL AND CELL STRUCTURES AND LONG-RANGE INTERNAL-STRESSES IN DEFORMED METAL CRYSTALS [J].
MUGHRABI, H .
ACTA METALLURGICA, 1983, 31 (09) :1367-1379
[24]   Stage IV work hardening in cell forming materials .1. Features of the dislocation structure determined by X-ray line broadening [J].
Muller, M ;
Zehetbauer, M ;
Borbely, A ;
Ungar, T .
SCRIPTA MATERIALIA, 1996, 35 (12) :1461-1466
[25]  
Rollett AD, 1988, THESIS DREXEL U
[26]   LARGE STRAIN WORK-HARDENING AND TEXTURES [J].
SEVILLANO, JG ;
VANHOUTTE, P ;
AERNOUDT, E .
PROGRESS IN MATERIALS SCIENCE, 1980, 25 (2-4) :69-412
[27]  
STUWE HP, 1965, Z METALLKD, V56, P633
[28]  
SUORTTI P, 1993, RIETVELD METHOD, V5, P167
[29]   Stage IV work hardening in cell forming materials .2. A new mechanism [J].
Ungar, T ;
Zehetbauer, M .
SCRIPTA MATERIALIA, 1996, 35 (12) :1467-1473
[30]   Particle-size, size distribution and dislocations in nanocrystalline tungsten-carbide [J].
Ungár, T ;
Borbély, A ;
Goren-Muginstein, GR ;
Berger, S ;
Rosen, AR .
NANOSTRUCTURED MATERIALS, 1999, 11 (01) :103-113