Comparison of microstructural evolution in laser-deposited and arc-melted in-situ Ti-TiB composites

被引:43
作者
Banerjee, R [1 ]
Genç, A [1 ]
Collins, PC [1 ]
Fraser, HL [1 ]
机构
[1] Ohio State Univ, Ctr Accelerated Maturat Mat, Dept Mat Sci & Engn, Columbus, OH 43210 USA
来源
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2004年 / 35A卷 / 07期
关键词
D O I
10.1007/s11661-004-0162-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In-situ Ti-TiB composites have been processed via two different routes: arc by melting elemental Ti and B and by direct laser deposition of a blend of elemental Ti and B powders using the laser-engineered net-shaping (LENS(TM)) process. The conventionally cast composite exhibits a significantly coarser-scale microstructure as compared with the LENS(TM)-deposited composite and consists of primary proeutectic TiB precipitates dispersed in an eutectic matrix. The microstructure of the LENS(TM)-deposited Ti-TiB composite consists of a fine-scale homogeneous dispersion of primary TiB precipitates in an alpha-Ti matrix. In addition, a nanometer-scale dispersion of secondary TiB precipitates is formed in the a matrix. The hardness and modulus of these composites have been measured using nanoindentation techniques. The ability to produce such a fine dispersion of TiB precipitates in near-net-shape, near-full-density Ti-TiB composites processed using LENS(TM) could potentially be highly beneficial from the viewpoint of applicability of these metal-matrix composites.
引用
收藏
页码:2143 / 2152
页数:10
相关论文
共 17 条
[1]  
Brooks J, 1999, SOL FREEFORM FABRIC, P375
[2]  
Brown C.O., 1982, Patent, Patent No. [US4323756A, 4323756]
[3]   MICROSTRUCTURAL INVESTIGATION OF A RAPIDLY SOLIDIFIED TI-6AL-4V-1B-0.5Y ALLOY [J].
FAN, Z ;
MIODOWNIK, AP ;
CHANDRASEKARAN, L ;
WARDCLOSE, CM .
JOURNAL OF MATERIALS SCIENCE, 1995, 30 (07) :1653-1660
[4]   Microstructural evolution in rapidly solidified Ti-7.5 Mn-0.5 B alloy [J].
Fan, Z ;
Miodownik, AP .
ACTA MATERIALIA, 1996, 44 (01) :93-110
[5]   Microstructure and tensile properties of mechanically alloyed Ti-6Al-4V with boron additions [J].
Godfrey, TMT ;
Wisbey, A ;
Goodwin, PS ;
Bagnall, K ;
Ward-Close, CM .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 282 (1-2) :240-250
[6]   Solidification in direct metal deposition by LENS processing [J].
Hofmeister, W ;
Griffith, M ;
Ensz, M ;
Smugeresky, J .
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 2001, 53 (09) :30-34
[7]   The laser forming of metallic components using particulate materials [J].
Keicher, DM ;
Smugeresky, JE .
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1997, 49 (05) :51-54
[8]   Manufacturing process and mechanical properties of fine TiB dispersed Ti-6Al-4V alloy composites obtained by reaction sintering [J].
Kobayashi, M ;
Funami, K ;
Suzuki, S ;
Ouchi, C .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 243 (1-2) :279-284
[9]   In-situ Ti-TiB metal-matrix composite prepared by a reactive pressing process [J].
Ma, ZY ;
Tjong, SC ;
Gen, L .
SCRIPTA MATERIALIA, 2000, 42 (04) :367-373
[10]   Growth and characterization of large La1-xPbxMnO3-δ crystals [J].
Milenov, TI ;
Botev, PA ;
Dinolova, EB ;
Dobreva, SG ;
Gospodinov, MM .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2000, 75 (01) :1-5