New Insights into Microstructure Characteristics and Tribological Property of Ti Alloy Processed by Hot-Dip Aluminizing and Heat Treatment

2022 ◽  
Author(s):  
Jianhua Zhao ◽  
Jingjing Shangguan ◽  
Lisen Gao ◽  
Cheng Gu ◽  
Yajun Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tribological Property ◽  
Ti Alloy ◽  
Microstructure Characteristics

Microstructure characteristics of an ultra-high strength extruded Al-4.7Cu–1Li-0.5Mg-0.1Zr–1Zn alloy during heat treatment

2020 ◽  
Vol 813 ◽  
pp. 152216 ◽  
Author(s):  
Jiangwei Sun ◽  
Guohua Wu ◽  
Liang Zhang ◽  
Xiaolong Zhang ◽  
Longling Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Strength ◽  
Microstructure Characteristics

EFFECT OF HEAT TREATMENT ON MICROSTRUCTURE CHARACTERISTICS OF LASER COMPOSITES

2014 ◽  
Vol 21 (01) ◽  
pp. 1450014
Author(s):  
PENG LIU ◽  
YUANBIN ZHANG ◽  
YAJIANG LI ◽  
QINGQING YANG ◽  
YAN LIU ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Theoretical Basis ◽  
Laser Alloying ◽  
Wear Properties ◽  
Microstructure Characteristics ◽  
Transmission Electron ◽  
Treatment Technologies ◽  
Intensity Transfer ◽  
Scanning Electron

In this paper, effect of heat treatment on the microstructures and wear properties of laser alloying (LA) composites is investigated. LA of the T - Co 50/ FeSi / TiC / TiN / CeO 2 mixed powders on substrate of 45 steel can form the hard composites, which increased the wear resistance of substrate greatly. Such LA composites were investigated by means of a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The tempering promoted the growth of the block-shape hard phases, favoring an enhancement of the integrity of block-shape hard phases; and tempering also improved greatly the formation mechanism, guarantying the composites to have enough ability of intensity transfer. This research provided essential experiment and theoretical basis to promote the application of the laser and heat treatment technologies in the field of surface modification.

Microstructure characteristics of Ti–43Al alloy during twin-roll strip casting and heat treatment

2019 ◽  
Vol 29 (5) ◽  
pp. 1017-1025 ◽  
Author(s):  
Mang XU ◽  
Guo-huai LIU ◽  
Tian-rui LI ◽  
Bing-xing WANG ◽  
Zhao-dong WANG
Keyword(s):  
Heat Treatment ◽  
Strip Casting ◽  
Microstructure Characteristics ◽  
Twin Roll

Formation and evolution of tri-modal microstructure during dual heat treatment for TA15 Ti-alloy

2019 ◽  
Vol 786 ◽  
pp. 894-905 ◽  
Author(s):  
Huili Wu ◽  
Zhichao Sun ◽  
Jing Cao ◽  
Zhikun Yin
Keyword(s):  
Heat Treatment ◽  
Ti Alloy ◽  
Formation And Evolution

Formation of Alumina Layer on Ti Alloy for Artificial Hip Joint

2014 ◽  
Vol 614 ◽  
pp. 200-205 ◽  
Author(s):  
Rohit Khanna ◽  
Tomiharu Matsushita ◽  
Tadashi Kokubo ◽  
Hiroaki Takadama
Keyword(s):  
Heat Treatment ◽  
Hip Joint ◽  
Thick Layer ◽  
Cold Spraying ◽  
Ti Alloy ◽  
Good Adhesion ◽  
Time Duration ◽  
Alumina Layer ◽  
Artificial Hip Joint ◽  
Artificial Hip

The purpose of this research is to form a layer of alumina on Ti-6Al-4V alloy for hip joint by deposition of Al layer on the Ti alloy and its subsequent oxidation. In this work, a thick layer of Al was deposited onto the Ti alloy by cold spraying. The reaction layer of Al3Ti was formed by heat treatment of cold sprayed Al at 640°C in air/Ar atmosphere to ensure a good adhesion between cold sprayed Al layer and the Ti alloy. A thick Al3Ti layer formed by heat treatment of Al layer at 640°C for 12 h in air, was subjected to heat treatment at 850°C for 96 h in air to form a-alumina and Al2Ti. Thus, alumina scales can be formed on the top surface of the Ti alloy and can be densified by increasing the time duration of heat treatment.

High Temperature Compression Properties of Ni3(Si,Ti) Based Intermetallic Compounds

2014 ◽  
Vol 783-786 ◽  
pp. 1129-1135
Author(s):  
Takehito Hagisawa ◽  
Hirokazu Madarame ◽  
Shinji Tanaka ◽  
Yasuyuki Kaneno ◽  
Takayuki Takasugi
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
High Temperature ◽  
Strain Rate ◽  
Volume Fraction ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
Ti Alloy ◽  
Compression Properties ◽  
Ti Alloys

High temperature compression properties of Al-, Cr-or Nb-added Ni3(Si,Ti) based intermetallic compounds were investigated by uni-axial compression test and microstructural observation. The Al-or Cr-added Ni3(Si,Ti) alloys after homogenization heat treatment exhibited a two-phase microstructure consisting of L12and Ni-solid solution phases. The Nb-added Ni3(Si,Ti) alloy after homogenization heat treatment exhibited a triple-phase microstructure consisting of G-phase with D8a structure and Ni-solid solution phase in the L12matrix. The volume fraction of Ni-solid solution phase increased in order of Cr-, Nb-and Al-added Ni3(Si,Ti) alloys. The Cr-added Ni3(Si,Ti) alloy was deformable at high strain rate, while the Nb-added one was deformable at low strain rate. It can be considered that the deformability of Ni3(Si,Ti) at high temperature is closely correlated with volume fraction of Ni-solid solution phase and recrystallization behavior.

Morphology of γ Precipitates in Ni-Rich γ'-Ni3 (Al,Ta)

1972 ◽  
Vol 30 ◽  
pp. 588-589
Author(s):  
B. H. Kear ◽  
J. E. Doherty ◽  
A. F. Giamei ◽  
L. P. Lemaire
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Binary System ◽  
Base Alloy ◽  
Ti Alloy ◽  
Nickel Base Alloy ◽  
New Findings ◽  
The Matrix ◽  
Nickel Base ◽  
Cuboidal Precipitate

The microstrueture of a commercial nickel-base alloy normally consists of a coherent, cuboidal precipitate of γ’ (alloyed Ni3Al) in a matrix of γ (Ni solid solution). Recently, Ham et al., working with the ternary alloy 78Ni-l8Al-4Ti (a/o), have shown that by appropriate heat treatment a completely novel microstrueture can be developed, in which the matrix is γ’ and the precipitate is platelet γ. The present study represents an extension of this work, and reports some new findings on precipitation of γ in γ’ in alloys similar in composition to the Ni-Al-Ti alloy but with Ta replacing Ti.The alloys used were solutionized in the range 2200-2400°F and aged at l600°F for 24hrs (giving ∼ 10 vol. percent of γ in γ’). According to our most recent findings, unlike the binary system, the solubility of γ’ for γ reaches a maximum at ∼ 2200°F in these alloys.

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