Microstructure Control of High Nitrogen Alpha + Beta Type Titanium Alloy

2007 ◽  
Vol 345-346 ◽  
pp. 193-196
Author(s):  
Tomohiro Ando ◽  
Koichi Nakashima ◽  
Toshihiro Tsuchiyama ◽  
Setsuo Takaki
Keyword(s):  
Solid Solution ◽  
Titanium Alloy ◽  
Martensite Plate ◽  
Aging Treatment ◽  
Plate Boundaries ◽  
High Nitrogen ◽  
Solid Solution Strengthening ◽  
Α Phase ◽  
Nitrided Specimen ◽  
Solution Strengthening

Solution nitriding and aging treatment were applied to Ti-4mass%Cr alloy in order to fabricate a ductile high-nitrogen titanium alloy with fine (α + β) structure. The solution-nitrided specimen withα’ martensitic structure was significantly hardened by solid solution strengthening by the absorbed nitrogen. During the aging treatment, fine β grains with a size of 1 microns in thickness precipitated along the martensite-plate boundaries. Although the specimen was softened to some extent after the aging treatment, the hardness is kept much higher than that of the aged Ti-4mass%Cr alloy without solution nitriding. This indicates that the nitrogen is still in solid solution of α phase even after the aging treatment, and contributes to strengthening of the fine-structured Ti-4mass%Cr-N alloy.

Comprehensive Strengthening of Microalloyed Pure Gold

2015 ◽  
Vol 713-715 ◽  
pp. 2617-2623
Author(s):  
Jun Ping Yuan ◽  
Chun Yu Ma ◽  
Chang Wang
Keyword(s):  
Solid Solution ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Pure Gold ◽  
Solid Solution Strengthening ◽  
Fine Grain ◽  
Performance Requirements ◽  
Fine Grain Strengthening ◽  
Solution Strengthening ◽  
And Performance

The hardness of pure gold jewellery is low which makes it difficult to meet structural design and performance requirements, and restricts its artistic value. In this research, scandium, calcium, and magnesium were used as alloying elements with pure gold, and the microstructure and hardening behaviour of modified pure gold were studied through cold-working, solid solution, and aging treatment. The results showed that the as-cast hardness of an Sc-Ca-Mg alloyed pure gold could reach HV64: after solution treatment at 700 °C, the hardness could reach HV55, and the microstructure in its solid solution state presented a homogeneous single phase. When the modified pure gold was deformed and the deformation rate reached 80%, the hardness reached HV118, after aging treatment at 250 °C and small precipitation phases were dispersed in its structure; the resultant grain size was finer than that of pure gold, and the hardness reached HV133. The hardening behaviour of this modified pure gold was the comprehensive effect of solid solution strengthening, fine-grain strengthening, deformation strengthening, and precipitation strengthening.

Solid Solution Strengthening of Sm in Mg-10Y-1.5Sm Alloy

2011 ◽  
Vol 194-196 ◽  
pp. 1378-1381
Author(s):  
Qing Zhang ◽  
Quan An Li ◽  
Xiao Tian Jing ◽  
Chang Qing Li
Keyword(s):  
Solid Solution ◽  
Aging Treatment ◽  
Microstructure Analysis ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
New Phase

By microstructure analysis and microhardness measuration, solid solution strengthening of Sm in Mg-10Y-1.5Sm alloy after solid solution and aging treatment was investigated. The results show that the microstructure of the alloy consists of α-Mg matrix and Mg24Y5 phase, and fine Mg24Y5 particles distribute in α-Mg matrix uniformly and dispersedly. No new phase forms after Sm addition, and Sm enhances α-Mg matrix and Mg24Y5 phase by solid solution effect. Compared with that of Mg-10Y alloy, the microhardness of the alloy with Sm addition increases obviously from HV87.7 to HV98.5.

The Effect of Test Temperature on Deformation Microstructure and Fracture Mechanisms in CrMn High-Nitrogen Steels Alloyed (0-3 wt.%) with Vanadium

2018 ◽  
Vol 941 ◽  
pp. 27-32 ◽  
Author(s):  
Elena Astafurova ◽  
Valentina Moskvina ◽  
Galina G. Maier ◽  
Eugene Melnikov ◽  
Nina Galchenko ◽  
...  
Keyword(s):  
Solid Solution ◽  
Test Temperature ◽  
Room Temperature ◽  
High Nitrogen ◽  
Interstitial Solid Solution ◽  
Vanadium Concentration ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Nitrogen Steels ◽  
Particle Strengthening

A temperature dependence of the tensile mechanical properties, microstructure and fracture mechanism of high-nitrogen Fe-(19-23)Cr-(17-21)Mn-(0-3)V-(0.1-0.3)C-(0.5-0.9)N vanadium-free and vanadium-containing steels was investigated. For all steels, the 0.2% offset yield strength and strain-hardening drastically increase with a decrease in test temperature. This is associated with high interstitial solid solution strengthening of the steels and more pronounced twinning and stacking-fault formation during straining below room temperature. For the vanadium-free steel, a ductile-to-brittle transition was evaluated: at 77K specimens destroy by cleavage mechanism while at room temperature steels show ductile fracture. Vanadium-alloying provides a particle strengthening of the steels and, at the same time, reduce solid-solution strengthening. Increase of vanadium concentration fully or partially suppress brittle fracture of the steels at 77K. Particle strengthening changes interstitial solid-solution effect, dislocation arrangement and slip/twinning relation in vanadium-containing high-nitrogen steels compared to vanadium-free one.

OLIN ALLOY C5218

Alloy Digest ◽  
2004 ◽  
Vol 53 (6) ◽  
Keyword(s):  
Solid Solution ◽  
Physical Properties ◽  
Tensile Properties ◽  
Bend Strength ◽  
Bronze Alloy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

Abstract Olin Alloy C5218 is a phosphor bronze alloy given both dispersion- and solid-solution strengthening for applications in the automotive connector market. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. Filing Code: CU-715. Producer or source: Olin Brass.

Lattice distortion as an estimator of solid solution strengthening in high-entropy alloys

2021 ◽  
pp. 110877
Author(s):  
Ankit Roy ◽  
Praveen Sreeramagiri ◽  
Tomas Babuska ◽  
Brandon Krick ◽  
Pratik K. Ray ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

scholarly journals Strength, Hardness, and Ductility Evidence of Solid Solution Strengthening and Limited Hydrogen Embrittlement in the Alloy System Palladium-Copper (Cu wt. % 5–25)

Hydrogen ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 262-272
Author(s):  
Sebastian DiMauro ◽  
Gabrielle Legall ◽  
Coleman Lubinsky ◽  
Monica Nadeau ◽  
Renee Tait ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrogen Embrittlement ◽  
Copper Content ◽  
Vickers Microhardness ◽  
Copper Alloys ◽  
Alloy System ◽  
Weight Percent ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Palladium Copper Alloys

Strength, hardness, and ductility characteristics were determined for a series of palladium-copper alloys that compositionally vary from 5 to 25 weight percent copper. Alloy specimens subjected to vacuum annealing showed clear evidence of solid solution strengthening. These specimens showed, as a function of increasing copper content, increased yield strength, ultimate strength, and Vickers microhardness, while their ductility was little affected by compositional differences. Annealed alloy specimens subsequently subjected to exposure to hydrogen at 323 K and PH2 = 1 atm showed evidence of hydrogen embrittlement up to a composition of ~15 wt. % Cu. The magnitude of the hydrogen embrittlement decreased with increasing copper content in the alloy.

Effect of Hydrogen on the Development of Superplastic Deformation in the Submicrocrystalline Ti–6Al–4V Alloy

2016 ◽  
Vol 838-839 ◽  
pp. 344-349 ◽  
Author(s):  
Galina P. Grabovetskaya ◽  
Ekaterina N. Stepanova ◽  
Ilya V. Ratochka ◽  
I.P. Mishin ◽  
Olga V. Zabudchenko
Keyword(s):  
Solid Solution ◽  
Plastic Deformation ◽  
Flow Stress ◽  
Superplastic Deformation ◽  
Deformation Localization ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Hydrogenation Effect

Hydrogenation effect on the development of superplastic deformation in the submicrocrystalline Ti–6Al–4V alloy at temperatures (0.4–0.5)Тmelt is investigated. Hydrogenation of the submicrocrystalline Ti–6Al–4V alloy to 0.26 mass% during superplastic deformation is found to result in solid solution strengthening, plastic deformation localization, and as a consequence, decrease of the deformation to failure. Possible reasons for the decrease of the flow stress and increase of the deformation to failure in the submicrocrystalline Ti–6Al–4V–0.26H alloy during deformation under conditions of superplasticity and simultaneous hydrogen degassing from the alloy are discussed.

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