材料期刊网

SYNTHESIS OF TiAl+TiB_2 COMPOSITE AND-ITS THERMAL STABILITY

QU Xuanhui HUANC Baiyun LEI Changming CHEN Shiqi Central South University of Technology , Changsha , China professor , Powder Metallurgy Research Institute , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

Synthesis process of a TiAl+TiB_2 composite from the elemental powders was studied by means of differential scanning calorimetry and X-ray diffractometry.TiB_2 particles may form in TiAl matrix at temperature even below 700℃ owing to the exothermic reactions between Ti and Al powders.TiB_2 particles...

关键词: TiAl alloy , null , null , null

ZrO2 strengthened NiAl/Cr(Mo,Hf) composite fabricated by powder metallurgy

自然科学进展﹒国际材料（英文）

The ZrO2 ceramic particles strengthened NiAl/Cr(Mo,Hf) composite was fabricated from the rapidly solidified NiAl/Cr(Mo,Hf) pre-alloyed powder and the ZrO2 powder by powder metallurgy<...

关键词: NiAl intermetallics;NiAl/Cr(Mo) composite;Powder metallurgy;ZrO2;strengthening;temperature compressive properties;mechanical-properties;eutectic;alloy;microstructure;behavior;nial-cr(mo)-hf

CRITICAL ISSUES OF POWDER METALLURGY TURBINE DISKS

K.M. Chang(Department of Mechanical and Aerospace Engineering , West Virginia University , P.O. Box 6160 , Morgantown , WV 26506 , USA Manuscript received 26 August 1996)

金属学报(英文版)

P/M superalloy disks obtain their final strength by appropriate heat treatments; the maximum attainable strength depends on the rapid cooling rate from the solution annealing. A rapid quench of a large disk forging can cause two problems, surface cracking and shape distortion.In the past,many attemp...

关键词: :superalloy disk , null , null , null , null , null , null

Improvement of Ductility of Powder Metallurgy Titanium Alloys by Addition of Rare Earth Element

Yong LIU , Lifang CHEN , Weifeng WEI , Huiping TANG , Bin LIU

材料科学技术（英文）

Ti-4.5Al-6.0Mo-1.5Fe, Ti-6Al-1Mo-1Fe and Ti-6Al-4V alloys were prepared by blended elemental powder metallurgy (PM) process, and the effects of Nd on the microstructures and mechanical properties were investigated by scanning electron mic...

关键词: Powder metallurgy titanium alloy , null , null , null

Ti Based Metal Matrix Composites Produced by Powder Metallurgy Routes

Z.G.Liu , B.Gabbitas , D.L.Zhang , J.Liang , W.Gao

材料科学技术（英文）

The production and microstructural characterization of two types of ceramic particulate reinforced Ti matrix composites (TMCs): Ti-6Al-4V/10~vol. pct TiB and Ti(Al,O)/58 vol. pct Al2O3 were studied. The Ti-6Al-4V/10 vol. pct TiB composite with refined microstructure has been produced using a combina...

关键词: Ti alloy , null , null , null

Fabrication and mechanical behavior of powder metallurgy processed in situ Nb/Al sheet metal-metal composites

Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

A deformation processed 20 vol. % Nb/Al metal-matrix composite sheet was fabricated with powder metallurgical (PM) route, i.e. by hot extrusion and cold rolling techniques. A comparative study was made on the mechanical properties for this rolled in situ 20 vol.% Nb/Al...

关键词: Nb/Al;extrusion;rolling;mechanical properties;metal-matrix;composites;ag-ni alloys;matrix composite;cold-drawn;wires;microstructure;deformation;strength;stability

Experimental Study and Finite Element Polycrystal Model Simulation of the Cold Rolling Textures in a Powder Metallurgy Processed Pure Aluminum Plate

Liqing CHEN , Naoyuki Kanetake

材料科学技术（英文）

Ingot metallurgy (IM) aluminum has long been the subject and attracted the attention of many metallurgists and textural researchers of materials. Due to the introduction of large amounts of ex situ interfaces, however, the textures in powder

关键词: Texture , null , null , null , null

Experimental and modeling investigation on SiC(p) distribution in powder metallurgy processed SiC(p)/2024 Al composites

Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

SiC(p)/2024Al composites were fabricated through the powder metallurgy (PM) technique. The mixing process was modified by using a high ball to charge ratio (BCR), which resulted in improved homogeneity of the SiC(p) distribution, as well ...

关键词: Analytical modeling;Metal-matrix composites;Powder metallurgy;Reinforcement distribution;aluminum-matrix composites;particle-size ratio;mechanical-properties;microstructure;reinforcement

Singly dispersed carbon nanotube/aluminum composites fabricated by powder metallurgy combined with friction stir processing

Carbon

Carbon nanotube (CNT)/aluminum composites were fabricated by a combination of powder metallurgy and subsequent friction stir processing (FSP). Microstructural observations indicated that the CNTs were singly dispersed in the composites. T...

关键词: reinforced aluminum composites;mechanical-properties;matrix;composites;nanotubes;strength;alloy

Workability Studies in Forming of Sintered Fe-035C Powder Metallurgy Preform During Cold Upsetting

S Narayan , A Rajeshkannan

钢铁研究学报(英文版)

An experimental investigation on the workability behaviour of sintered Fe-035C steel preforms under cold upsetting, have been studied in order to understand the influence of aspect ratio and lubrication condition on the workability process. The above mentioned powder ...

关键词: powder metallurgy , failure analysis , plastic behaviour , workability