Solid-Solution Strengthening Effect of Vanadium Addition to Iron-Modified L12 Titanium Trialuminides

1994 ◽  
Vol 364 ◽  
Author(s):  
Tohru Takahashi ◽  
Tadashi Hasegawa
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Intermetallic Compounds ◽  
Argon Atmosphere ◽  
Strengthening Effect ◽  
Cubic Symmetry ◽  
Solid Solution Strengthening ◽  
Arc Melting ◽  
Solution Strengthening ◽  
Cubic Structure

AbstractTwo types of aluminum–titanium–iron–vanadium ( Al–Ti–Fe–V ) quarternary intermetallic compounds have been prepared by arc melting under argon atmosphere. Their compositions were nominally Al66Ti25Fe6V3 and Al66Ti25Fe3V6. These alloys are based on the iron–modified titanium trialuminide with L12 cubic structure. Vanadium addition up to about 6 mol% did not destroy the cubic symmetry, and L12 solid solution compounds were produced in these two Al–Ti–Fe–V quarternary alloys. Microstructure and mechanical properties have been investigated. It has been demonstrated that vanadium addition to iron–modified L12 titanium trialuminides can enhance their strength.

Mechanical Properties of Ga1–xInxAs

1985 ◽  
Vol 53 ◽  
Author(s):  
S. Guruswamy ◽  
J.P. Hirth ◽  
K.T. Faber
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
High Temperature ◽  
Strengthening Effect ◽  
Plateau Stress ◽  
Solid Solution Strengthening ◽  
Stress Region ◽  
Solution Strengthening ◽  
Concentration Levels ◽  
Undoped Gaas

ABSTRACTSubstantial solid solution strengthening of GaAs by In acting as InAs4 units has recently been predicted. This strengthening could account for the reduction of dislocation density in GaAs single crystals grown from the melt. High temperature hardness measurements up to 700ºC have been carried out on (100) GaAs and Ga0.9975 In0.0025 As wafers. Results show a significant strengthening effect in In—doped GaAs even at concentration levels of about 0.2 wt%. A temperature independent flow stress region is observed for both these alloys. The In—doped GaAs shows ahigher plateau stress level compared to the undoped GaAs. The results are consistent with the solid solution strengthening model.

Carbon effects in rapidly solidified Ni3Al

1986 ◽  
Vol 1 (1) ◽  
pp. 60-67 ◽  
Author(s):  
S. C. Huang ◽  
C. L. Briant ◽  
K.-M. Chang ◽  
A. I. Taub ◽  
E. L. Hall
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Intermetallic Compound ◽  
Shear Modulus ◽  
Lattice Parameter ◽  
Strengthening Effect ◽  
Auger Analysis ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Rapidly Solidified

The effect of carbon on the mechanical properties of ordered, face-center-cubic Ni3Al has been studied. It has been found that carbon provides no ductihzation to the intermetallic compound, but exerts a large solid solution strengthening effect. The strengthening rate measured is Δσy/ΔC∼0.5G per atom percent carbon, where G is the Ni3Al shear modulus. Auger analysis and lattice parameter measurements were also carried out. The results are discussed with respect to the nature of carbon in grain boundary regions and in the bulk.

scholarly journals Microstructure and Mechanical Properties of TaNbVTiAlx Refractory High-Entropy Alloys

Entropy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 282 ◽  
Author(s):  
Li Xiang ◽  
Wenmin Guo ◽  
Bin Liu ◽  
Ao Fu ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
High Entropy Alloys ◽  
Strengthening Effect ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Specific Strength ◽  
Compression Properties ◽  
Uniform Microstructure ◽  
Solution Strengthening

A series of TaNbVTiAlx (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) refractory high-entropy alloys (RHEAs) with high specific strength and reasonable plasticity were prepared using powder metallurgy (P/M) technology. This paper studied their microstructure and compression properties. The results show that all the TaNbVTiAlx RHEAs exhibited a single BCC solid solution microstructure with no elemental segregation. The P/M TaNbVTiAlx RHEAs showed excellent room-temperature specific strength (207.11 MPa*cm3/g) and high-temperature specific strength (88.37 MPa*cm3/g at 900 °C and 16.03 MPa*cm3/g at 1200 °C), with reasonable plasticity, suggesting that these RHEAs have potential to be applied at temperatures >1200 °C. The reasons for the excellent mechanical properties of P/M TaNbVTiAl0.2 RHEA were the uniform microstructure and solid solution strengthening effect.

Effect of Ti Element on Microstructure and Properties of Cu-Cr Alloy

2015 ◽  
Vol 817 ◽  
pp. 307-311 ◽  
Author(s):  
Peng Chao Zhang ◽  
Jin Chuan Jie ◽  
Yuan Gao ◽  
Tong Min Wang ◽  
Ting Ju Li
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Spherical Shape ◽  
Precipitation Strengthening ◽  
Peak Hardness ◽  
Ti Alloy ◽  
Strengthening Mechanisms ◽  
Vacuum Melting ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

The Cu-Cr and Cu-Cr-Ti alloy plates were prepared by vacuum melting and plastic deformation. The effect of slight Ti element on microstructure and mechanical properties of Cu-Cr alloy was discussed. The result shows that Cr particles with spherical shape precipitated from Cu matrix after aging. Plenty Ti atoms dissolved in the vicinity of Cr particles and there were still parts of solid solution Ti atoms in other regions. Improvements in peak hardness and softening resistance were achieved with the addition of Ti element in Cu-Cr alloy. The addition of 0.1 wt.% Ti element makes Cu-Cr alloy possess tensile strength of 565 MPa and hardness of 185.9 HV after aging at 450 °C for 120 min, which can be attributed to multiple strengthening mechanisms, i.e. work hardening, solid solution strengthening and precipitation strengthening.

Pseudoelasticity in High Strengthening Fcc Single Crystals

1996 ◽  
Vol 459 ◽  
Author(s):  
Yu.I. Chumlyakov ◽  
I. V. Kireeva ◽  
G. S. Kapasova ◽  
E. I. Litvinova
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Single Crystals ◽  
Stress Level ◽  
Deformation Mechanism ◽  
Crystal Orientation ◽  
Dispersion Hardening ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Applied Stresses

ABSTRACTIt was experimentally shown that the achievement of a high deforming stress level due to dispersion hardening and solid solution strengthening of FCC single crystals with a low stacking-fault energy leads to the deformation mechanism changing from slip to twinning, the dependence of mechanical properties on a crystal orientation and a sign of applied stresses. During deformation by twinning at T<150–300K effects of pseudoelasticity associated with elastic twinning is observed.

Microstructure, Mechanical Properties, Electric and Thermal Conductivity of the As-Extruded Al-x(1.0 wt.% Zn + 0.5 wt.% Cu) Alloys (x = 1, 2 and 4)

2020 ◽  
Vol 20 (7) ◽  
pp. 4248-4252
Author(s):  
Yong-Ho Kim ◽  
Hyo-Sang Yoo ◽  
Hyeon-Taek Son
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Intermetallic Compounds ◽  
Extrusion Process ◽  
Al Alloy ◽  
Homogenization Treatment ◽  
Solid Solution Strengthening ◽  
Cu Content ◽  
Average Grain Size ◽  
Solution Strengthening

In this research, effects of Zn and Cu content on microstructure, mechanical properties, electric and thermal conductivity of the as-extruded Al-x(Zn+0.5Cu) alloys were investigated. As the content of Zn and Cu increased, the area ratio of Al2Cu intermetallic compounds increased. After homogenization treatment and extrusion process, most of Al2Cu intermetallic compounds was disappeared due to solution in Al matrix of Cu atoms. As the (Zn+0.5Cu) content increased from 1 to 2 wt.%, the average grain size decreased remarkably from 645 to 227 μm due to the dynamic recrystallization caused by the solute Zn and Cu atoms during the extrusion. With increasing Zn and Cu additions, the thermal conductivity was decreased from 225 (x = 1) to 208 (x = 2) and 183 W/mK (x = 4) due to electric scattering by solute Zn and Cu atoms. The ultimate tensile strength (UTS) of the as-extruded Al-x(1Zn+0.5Cu) alloys improved remarkably from 77 (x = 1) to 142 MPa (x = 4) as Zn and Cu content increased, and the elongation increased from 30 to 33%. This improvement in the strength resulted from the grain refinement and solid solution strengthening due to the solute Zn and Cu atoms. The Zn and Cu addition in Al alloy played an important role in thermal conductivity and mechanical properties.

The Effect of Heat Treatment on Microstructure and Mechanical Properties of ZK60 Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 718-721
Author(s):  
Ding Fei Zhang ◽  
Rong Shen Liu ◽  
Jian Peng ◽  
Wei Yuang ◽  
Hong Ju Zhang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Age Hardening ◽  
Second Phase ◽  
Solid Solution Strengthening ◽  
Microstructure And Mechanical Properties ◽  
Long Time ◽  
Zk60 Alloy ◽  
Solution Strengthening

With different heat treatment, the microstructure and mechanical properties of ZK60 magnesium alloy were investigated. It can be concluded that heat treatment has great effect on mechanical properties of ZK60. With artificial aging after extruding, the precipitation of the second phase from the supersaturated solid solution significantly improved mechanical properties. It can greatly increase yield strength of ZK60 alloy, while the tensile strength has little change. For the combination of solid solution strengthening and age hardening, two opposite factors must be considered. On one hand, the solid solution strengthening and the later precipitation strengthening is good for alloy’s strength; on the other hand, the properties decrease as the grains grew under high temperature for a long time during solution heating.

scholarly journals Orientation-dependent solid solution strengthening in zirconium: a nanoindentation study

2019 ◽  
Vol 55 (10) ◽  
pp. 4493-4503 ◽  
Author(s):  
Arijit Lodh ◽  
Prita Pant ◽  
Gulshan Kumar ◽  
K. V. Mani Krishna ◽  
Raghvendra Tewari ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Finite Element ◽  
Elastic Modulus ◽  
Constitutive Relationship ◽  
Insignificant Change ◽  
Solid Solution Strengthening ◽  
Pure Zirconium ◽  
Solution Strengthening ◽  
Peak Value

AbstractOrientation-dependent solid solution strengthening was explored through a combined microtexture plus nanoindentation study. Pure zirconium (6N purity crystal-bar Zr) and commercial Zircaloy-2 were investigated for comparison. Local mechanical properties were estimated through finite element (FE) simulations of the unloading part of the nanoindentation load–displacement response. Combinations of ‘averaging’ scheme and constitutive relationship were used to resolve uncertainty of FE-extracted mechanical properties. Comparing the two grades, non-basal oriented grains showed an overall hardening and increase in elastic modulus. In contrast, insignificant change was observed for basal (or near-basal) oriented grains. The strengthening of non-basal orientations appeared via elimination of the lowest hardness/stiffness values without a shift in the peak value. Such asymmetric development brought out the clear picture of orientation-dependent solid solution strengthening in zirconium.

Optical, Thermal, and Mechanical Properties of (Y1-xScx)2O3 Transparent Ceramics

2021 ◽  
Author(s):  
Jiquan Huang ◽  
Changliang YANG ◽  
Qiufeng HUANG ◽  
Zhonghua DENG ◽  
Yun WANG ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Transparent Ceramics ◽  
Sintering Process ◽  
Vacuum Sintering ◽  
Solid Solution Strengthening ◽  
Complete Solid Solution ◽  
Wide Wavelength Range ◽  
Universal Approach ◽  
Solution Strengthening

Abstract Sesquioxides such as Y2O3 and Sc2O3 are important optical materials, but the fabrication of their transparent ceramics remains a challenge due to the ultra-high melting point of over 2400 oC. In this work, a series of (Y1-xScx)2O3 transparent ceramics were successfully fabricated by a simple vacuum sintering process without any sintering additives, and the effect of Scandium (Sc) content on the crystal structure and optical/thermal/mechanical properties were evaluated. Y2O3 and Sc2O3 form a complete solid solution with a cubic bixbyite structure. The formation of (Y1-xScx)2O3 solid solution promotes the densification of ceramics, leading to the realization of high transparency close to the theoretical transmittance over a wide wavelength range of 0.35-8 mm. In particular, the in-line transmittance in the range of 0.6-6 mm remains above 80% for (Y1-xScx)2O3 with x = 0.23-0.31, while the pristine Y2O3 and Sc2O3 are opaque. Moreover, the mechanical properties including Vickers hardness (Hv), fracture toughness (KIC), and biaxial strength (δb) are evidently enhanced due to the solid solution strengthening, while the thermal conductivity is reduced due to the reduction of photon free path. This study demonstrates that forming of solid solution is a facile and universal approach for preparing sesquioxides transparent ceramics with high optical and mechanical quality.

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