scholarly journals Enhancing the Corrosion Resistance Performance of Mg-1.8Zn-1.74Gd-0.5Y-0.4Zr Biomaterial via Solution Treatment Process

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 836 ◽  
Author(s):  
Ya Liu ◽  
Jiuba Wen ◽  
Huai Yao ◽  
Junguang He ◽  
Huan Li
Keyword(s):  
Corrosion Resistance ◽  
Treatment Process ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Second Phase ◽  
Solution Treatment Temperature ◽  
Uniform Corrosion ◽  
Homogeneous Microstructure ◽  
Solution Treated

Microstructure and corrosion behavior of the solution-treated Mg-1.8Zn-1.74Gd-0.5Y-0.4Zr (wt%) alloy were studied. The results of microstructure indicated that the second phases of as-cast alloy was mainly comprised of Mg12Zn(Gd,Y) phase, Mg3Zn3(Gd,Y)2 phase and (Mg,Zn)3(Gd,Y) phase. After solution treatment process, the second phase gradually dissolved into the matrix, and the grain size increased. The effect of microgalvanic corrosion between α-Mg matrix and second phase was also improved. At the range of 470~510 °C solution treatment temperature, the corrosion resistance of the samples increases at first and then decreases slightly at 510 °C. All the solution-treated Mg-Zn-Gd-Y-Zr samples exhibit better corrosion resistance in comparison with as-cast sample. The existence form of the remaining phase affects the morphology of the corroded surface that relatively complete dissolution with homogeneous microstructure makes the sample more effective to obtain uniform corrosion form. The optimum temperature for solution treatment is 490 °C, which shows a much better corrosion resistance and uniform corrosion form after soaking for a long time.

Effect of Solution Treatment Temperature on Properties of an Al11Si3Cu0.35Mg Cast Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 357-360
Author(s):  
Gui Qing Wang ◽  
Zhong Kui Zhao ◽  
Yan Liu
Keyword(s):  
Mechanical Properties ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Solution Temperature ◽  
Solution Treatment Temperature ◽  
Permanent Mold ◽  
Incipient Melting ◽  
Solution Treated ◽  
Alloy Properties

The present work was performed on Al11Si3Cu0.35Mg samples cast in a permanent mold preheated to 200 °C. The tensile properties for varies solution treated samples aged at 200 °C for 6 h were examined in order to study the influence of solution temperature on the alloy properties. The dissolution of copper-containing phases and the incipient melting were analyzed for cast samples solution treated in the temperature range 500~520 °C for 8 h followed by quenching in water. The influence of the incipient melting on mechanical properties has been discussed.

Effect of Solution Treatment Temperature on Microstructure and Mechanical Properties of Al-5.1Zn-2Mg-0.1Ti (wt. %) Produced by Squeeze Casting

2018 ◽  
Vol 939 ◽  
pp. 38-45 ◽  
Author(s):  
Risly Wijanarko ◽  
Irene Angela ◽  
Bondan Tiara Sofyan
Keyword(s):  
Squeeze Casting ◽  
Volume Fraction ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Ageing Process ◽  
Al Alloy ◽  
Second Phase ◽  
Solution Treatment Temperature ◽  
Phase Volume Fraction ◽  
Ti Addition

Al 7xxx alloy is a heat treatable Al alloy with superior strength. Solution treatment in precipitation hardening sequence of the alloy has an important role to dissolve second phases and bring vacancies out to form precipitates in the ageing process. Another strengthening can be done by Ti addition as grain refiner. As cast alloy by squeeze casting was homogenized at 400 °C for 4 h. Solution treatment was conducted at 220, 420, and 490 °C, followed by rapid quenching. Subsequent ageing was conducted at 130 °C for 48 h. Characterization was performed by optical microscope, SEM-EDS (Scanning Electron Microscopy – Energy Dispersive Spectroscopy), Rockwell hardness testing, XRD (X-Ray Diffraction), and STA (Simultaneous Thermal Analysis). Ti added alloy showed rounder grains, lower hardness, and more reduction in second phase volume fraction along with increasing solution treatment temperature than those in alloys without Ti addition. Otherwise, the alloy final hardness was increasing and higher after the ageing process due to higher second phase dissolution which leads to more precipitates formed.

Effect of Solution Treatment Temperature on the Microstructure of Fe-33Ni-19Cr Alloy

2020 ◽  
Vol 1010 ◽  
pp. 21-27
Author(s):  
Noraziana Parimin ◽  
Esah Hamzah
Keyword(s):  
Grain Size ◽  
Solution Treatment ◽  
Optical Microscope ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solution Treated ◽  
Average Grain Size ◽  
Different Temperatures

The effect of solution treatment temperature on the microstructure, phase present and hardness on Fe-33Ni-19Cr alloy was study in this work. The Fe-33Ni-19Cr alloy was experienced a solution treatment process at six different temperatures which are 950 °C, 1000 °C, 1050 °C, 1100 °C, 1150 °C and 1200 °C for 3 hours soaking time followed by water quench. The average grain size was measured by using linear intercept methods ASTM E112. Microstructure of solution-treated Fe-33Ni-19Cr alloy was characterized by using optical microscope and scanning electron microscope (SEM) equipped with energy dispersive x-ray (EDX) spectrometer. The phase present was analyzed using x-ray diffraction (XRD) technique. The Vickers hardness was used to measure the hardness of solution-treated Fe-33Ni-19Cr alloy. Increasing the solution treatment temperatures were increase the average grain size of solution-treated Fe-33Ni-19Cr alloy. In addition, all samples exhibited an equiaxed matrix grain with slight distribution of precipitates particles. The hardness of solution-treated Fe-33Ni-19Cr alloy was decrease as the solution treatment temperature increase.

scholarly journals Effect of Solution Treatment Temperature on Microstructural Evolution, Precipitation Behavior, and Comprehensive Properties in UNS S32750 Super Duplex Stainless Steel

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1481
Author(s):  
Junhe Li ◽  
Wei Shen ◽  
Ping Lin ◽  
Fuming Wang ◽  
Zhanbing Yang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Element Distribution ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Super Duplex Stainless Steel ◽  
Σ Phase ◽  
Comprehensive Properties

The changes of microstructures, element distribution, and comprehensive properties were studied to explore their interactions with each other, induced by solution treatment of UNS S32750 super duplex stainless steel. The results showed that the ferrite content improved, while the austenite content declined as the temperature increased. From 900 to 1000 °C, the σ phase existing at α/γ grain boundaries and in ferrite grains gradually dissolved. At 1050 °C, the microstructures consisted of only ferrite and austenite. From 1050 to 1300 °C, the Cr2N precipitated in ferrite and gradually grew and coarsened. The impact energy and pitting potential of UNS S32750 first improved and then weakened, while the hardness is the opposite, owing to the combined effects of element distribution, microstructures, and precipitates. In the presence of the σ phase, the corrosion resistance and mechanical properties of UNS S32750 correspond directly to the σ phase fraction. Subsequently, the rise in temperature promoted γ → α phase transformation, and the elements partitioning ratios of Cr and Mo declined, resulting in reduced toughness and corrosion resistance and a rise in hardness. Consequently, when the solution treatment temperature is 1050 °C, the α/γ ratio of UNS S32750 approached 1:1, with excellent overall properties.

Effect of Solution-Treated Temperature on Microstructure in TiNixCu12 (x = 39, 40 at %) Alloys

2020 ◽  
Vol 12 (9) ◽  
pp. 1399-1402
Author(s):  
Ji-Hyun Kim ◽  
Min-Su Kim ◽  
Tae-Hyun Nam
Keyword(s):  
Volume Fraction ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Transformation Behavior ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Solution Treated ◽  
Ni Content ◽  
Scanning Electron

Ti–xNi–12Cu (at%) (x = 39, 40) alloys were prepared and then their transformation behavior and microstructures were investigated after solution treatment at various temperatures by means of scanning electron microscopy, energy dispersive X-ray spectroscopy, and differential scanning calorimetry. Matrix (B2), Ti2 (Ni, Cu) and Ti(Ni, Cu)2 phases were observed in all specimens except the TiNi39Cu12 alloy solution treated at 1373 K in which matrix (B2) and Ti2 (Ni, Cu) were observed. Volume fraction of Ti(Ni, Cu)2 phase decreased with increasing solution treatment temperature. All specimens showed the B2–B19 martensitic transformation behavior. Transformation temperatures and hysteresis decreased with increasing solution treatment temperature, which was ascribed to the decrease in the volume fraction of Ti(Ni, Cu)2 phase resulting in the increase in Ni content of matrix.

scholarly journals Correlation between Solution Treatment Temperature, MicroStructure, and Yield Strength of Forged Ti-17 Alloys

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 625
Author(s):  
Yoko Yamabe-Mitarai ◽  
Syuji Kuroda ◽  
Norie Motohashi ◽  
Takanobu Hiroto ◽  
Akira Ishida ◽  
...  
Keyword(s):  
Yield Strength ◽  
Room Temperature ◽  
Volume Fraction ◽  
Solution Treatment ◽  
Aging Treatment ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Jet Engines ◽  
Solution Treated ◽  
Α Phase

The Ti compressor disks of aviation jet engines are produced by forging. Their microstructure, which depends on the forging conditions, strongly affects their mechanical properties. In this study, changes in the microstructure of Ti-17 alloy as a result of different solution-treatment (ST) temperatures and the related tensile yield strengths were investigated to elucidate the correlation between the ST temperature, microstructure, and yield strength. Ti-17 alloys ingots were isothermally forged at 800 °C and solution-treated at 750, 800, and 850 °C. The microstructure and yield strength were investigated for samples subjected to different ST temperatures. The primary α phase formed during the ST, and the secondary α phase formed during the aging treatment at 620 °C. The yield strength increased with increasing volume fraction of the primary α phase and increased further upon formation of the secondary α phase during the tensile test at room temperature. The correlation of the primary and secondary α phases with yield strength was clarified for tensile properties at room temperature, 450, and 600 °C. An equation to predict the yield strength was constructed using the volume fraction of the primary and secondary α phases.

Effect of Solution Treatment on Microstructure and Properties of the SAF2507 Super Duplex Stainless Steel

2012 ◽  
Vol 724 ◽  
pp. 3-6 ◽  
Author(s):  
Jin Ming Liu ◽  
Jie Liu ◽  
Guang Wei Fan ◽  
Dong Fang Du ◽  
Guo Ping Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Solution Treatment ◽  
Tensile Tests ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Super Duplex Stainless Steel ◽  
Phase Precipitation ◽  
Σ Phase ◽  
Solution Treated

Effect of solution treated temperature at 5001100°C on ferrite/austenite ratio and σ phase precipitation has been studied in this paper, and the tensile properties after solution treatment at 950°C and 1050°C is compared. The results shows that the ferrite/austenite ratio treated 1050~1100°C is about 1:1; and the formation of σ phase occurs in the ferrite or at ferrite - austenite boundary. The quantity of the σ phase precipitation increases firstly and then decreases with increase of the solution treatment temperature, reaching the maximum at 900°C, and disperse at above 1050°C. Tensile tests show that the fracture is brittle divided and stretched by ductile belt at 950°C, and ductile at 1050°C.

Effect of Solid Solution Treatment on Corrosion Resistance of Al-Cu-Mg-Ag Alloy

2021 ◽  
Vol 1032 ◽  
pp. 213-219
Author(s):  
Zhen Hua Cui ◽  
Xiao Yan Liu ◽  
Yan Qin Wang ◽  
Hong Ru Yang ◽  
Zhen Jie Cui ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Grain Boundary ◽  
Intergranular Corrosion ◽  
Solution Treatment ◽  
Electrochemical Corrosion ◽  
Treatment Temperature ◽  
Boundary Structure ◽  
Solution Treatment Temperature ◽  
Grain Boundary Structure ◽  
Electrochemical Corrosion Resistance

In this experiment, Al-Cu-Mg-Ag alloy was used as material and solution temperature was used as variable to investigate its effect on the corrosion properties of the alloy and Hardness test, metallographic observation, electrochemical test, intergranular corrosion and exfoliation corrosion test were carried out on three groups of samples. The results show that the intergranular corrosion resistance of the alloy decreases with the increase of solution treatment temperature, and the sample treated at 505 °C has the best performance. This is mainly because grain boundary structure plays a role in increasing PFZ and expanding corrosion channels. The exfoliation corrosion resistance of Al-Cu-Mg-Ag alloy increases first and then decreases, and the sample treated at 515 °C has the best performance. This is due to the dual effects of grain boundary structure and grain morphology. On the one hand, the solution treatment temperature increases, which widens the precipitation-free zone and reduces the electrochemical corrosion resistance of the alloy. On the other hand, the increase of recrystallized grains decreases the cohesion of corrosion products and enhances the electrochemical corrosion resistance of the alloy.

Sign in / Sign up

Export Citation Format

Share Document