scholarly journals Investigations on the Influence of Annealing on Microstructure and Mechanical Properties of Electrodeposited Ni-Mo and Ni-Mo-W Alloy Coatings

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1428
Author(s):  
Chao Zhang ◽  
Wudong Si ◽  
Yin Wang ◽  
Sichao Dai ◽  
Da Shu
Keyword(s):  
Heat Treatment ◽  
Abrasive Wear ◽  
Annealing Temperature ◽  
Adhesive Wear ◽  
Stainless Steel Sheet ◽  
Elastic Module ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Annealing Heat Treatment ◽  
Annealing Heat

Ni-Mo and Ni-Mo-W coatings were electrodeposited on a stainless steel sheet, and then were annealed at 200, 400, and 600 °C. The effect of annealing heat treatment on the microstructure of Ni-Mo and Ni-Mo-W electrodepositions, their nano-hardness, and tribological properties were investigated. It was revealed that the average crystalline are refined and phase separation are promoted with formation of Mo-W related intermetallic precipitates at temperature exceed 400 °C on account of the co-existence of Mo-W elements within Ni-Mo-W coatings. Annealing heat treatment leads to hardening, and the hardness and elastic module increase significantly. The grain boundary (GB) relaxation and hard precipitated intermetallic particles are responsible for the annealing-induced hardening for ≤400 °C annealed and 600 °C annealed Ni-Mo-W coatings, respectively. In addition, both adhesive wear and abrasive wear are observed for coatings, and abrasive wear becomes predominant when annealing temperature up to 600 °C. The wear resistance of coatings is improved eventually by formation of a mixture of lubricated oxides upon annealing at 600 °C and the enhancement of H/E ratio for ≤400 °C annealed Ni-Mo-W coatings.

Effect of Annealing Heat Treatment on the Microstructural Refinement of Pure Copper by Friction Stir Processing

2013 ◽  
Vol 829 ◽  
pp. 131-135 ◽  
Author(s):  
Amir Mostafapour ◽  
Vahid Rezazadeh ◽  
Salar Salahi
Keyword(s):  
Heat Treatment ◽  
Friction Stir Processing ◽  
Annealing Temperature ◽  
Frictional Heating ◽  
Pure Copper ◽  
Annealing Duration ◽  
Mechanical Mixing ◽  
Friction Stir ◽  
Annealing Heat Treatment ◽  
Annealing Heat

Recently, friction stir processing (FSP) was developed as an effective method to modify microstructural and mechanical properties of materials. During process, a rotating tool is inserted in a plate, providing frictional heating and mechanical mixing. In this investigation, the effect of annealing heat treatment on the microstructure characteristics of the nugget zone was investigated during friction stirs processing (FSP) of the pure copper. Plate with 4 mm thickness was friction stir processed at constant traverse speed of 45 mm/min and tool rotation speed of 700 rpm. Samples were processed in various annealing conditions. Results showed that by increasing the annealing duration from 45 to 180 minutes at annealing temperatures of 600°C and 800°C, the grain size and the hardness value of samples significantly decreased. At annealing temperature of 1000°C samples were exposed to extra heat, grains started to coarsen and hardness decreased. Ultrafine-grained microstructure in FSP samples was achieved using annealing heat treatment at annealing temperature of 600°C.

scholarly journals Pengaruh Annealing terhadap Sifat Keras dan Struktur Mikro Baja Tahan Karat AISI 410-3Mo-3Ni

Metalurgi ◽  
2020 ◽  
Vol 35 (2) ◽  
pp. 75
Author(s):  
Vinda Puspasari ◽  
Mukhlis Agung Prasetyo ◽  
Januarius Velix Ta’an Halab ◽  
Moch. Syaiful Anwar ◽  
Efendi Mabruri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Annealing Time ◽  
Annealing Temperature ◽  
Martensitic Steel ◽  
Annealing Treatment ◽  
Delta Ferrite ◽  
Carbide Phases ◽  
Annealing Heat Treatment ◽  
Annealing Heat

AISI 410-3Mo-3Ni stainless steel is a martensitic steel which limited in using when compared to austenitic and ferritic stainless steels. Martensitic steel has an essential role in specific components due to a combination of strength, toughness and excellent corrosion resistance. However, martensitic steel tends to undergo decreasing in mechanical properties and microstructure after the forging process. In this study, mechanical properties and microstructure of the forged AISI 410 after receiving annealing heat treatment will be studied. Annealing aims to reduce material hardness and increase grain refinement of material. Annealing heat treatment is carried out by varying the annealing temperature and time. Annealing temperature variations are 7000, 7600, and 8000C. The annealing time variation is 3 hours and 6 hours. The effect of annealing time and temperature will be studied on the hardness and microstructure of the AISI 410 modified material. The optimum hardness of 35.9 HRC in sample with annealing treatment in 760°C for 6 hours. The microstructure shows delta ferrite, martensite, austenite, and carbide phases which affect hardness value of annealed samples.   

Effect of heat treatment on the two-way recovery stress of tube-shaped NiTi

2012 ◽  
Vol 23 (10) ◽  
pp. 1161-1168 ◽  
Author(s):  
Young Ik Yoo ◽  
Ju Won Jeong ◽  
Jung Ju Lee ◽  
Chang Ho Lee
Keyword(s):  
Heat Treatment ◽  
Shape Memory ◽  
Annealing Temperature ◽  
Recovery Stress ◽  
Treatment Conditions ◽  
Heat Treated ◽  
Annealing Heat Treatment ◽  
Optimum Annealing Temperature ◽  
Tubular Specimens ◽  
Annealing Heat

The effect of annealing temperatures on the thermomechanical behavior of NiTi in terms of transformation temperatures, mechanical properties, two-way shape memory strain, and two-way recovery stress was investigated experimentally to develop a NiTi tubular actuator with high two-way recovery force. Five tubular specimens were used to obtain the two-way shape memory strain and two-way recovery stress by varying heat treatment conditions. Annealing heat-treated temperatures were 400°C, 500°C, 600°C, 700°C, and 800°C. A two-way shape memory effect was introduced in the shape memory alloy tube by thermomechanical treatment after annealing heat treatment. According to the results, the two-way strain induced by shape memory cycling was independent of the annealing temperature. However, the two-way recovery stress generated by the two-way strain depended on the annealing temperature, even though the values of the two-way strain were similar in all specimens. Considering all heat treatment results, we concluded that the optimum annealing temperature to acquire two-way recovery stress and two-way strain for an actuator is 600°C.

scholarly journals Effects of Full Annealing Heat Treatment on Long-term Creep Strength of 2.25Cr-1Mo Steel Welded Joint

2003 ◽  
Vol 21 (2) ◽  
pp. 195-203 ◽  
Author(s):  
Kazuhiro KIMURA ◽  
Takashi WATANABE ◽  
Hiromichi HONGO ◽  
Masayoshi YAMAZAKI ◽  
Jun-ichi KINUGAWA ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Creep Strength ◽  
Welded Joint ◽  
Annealing Heat Treatment ◽  
Full Annealing ◽  
Term Creep ◽  
Annealing Heat

Modeling of Annealing Heat Treatment Parameters for Zr Alloy Tube by ANN-Ga

2020 ◽  
Vol 1001 ◽  
pp. 207-211
Author(s):  
Xing Xing Tong ◽  
Xue Wen Tong
Keyword(s):  
Neural Network ◽  
Heat Treatment ◽  
Mechanical Property ◽  
Network Architecture ◽  
Heat Treatments ◽  
Annealing Heat Treatment ◽  
Alloy Heat ◽  
Artificial Neural Network Ann ◽  
Zr Alloy ◽  
Annealing Heat

In this paper, there are tow part of module for predicting the Annealing heat treatments of Zr tube. The artificial neural network (ANN) were used for relationship between mechanical property and annealing parameters. The genetic algorithm (GA) were used for Annealing heat treatments of Zr tube. The best ANN network architecture is 2-8-3, and the optimum values of momentum factor is 0.8 while the Crossover is also 0.8 by ANN-GA, which can be efficiently track the effect of annealing Heat treatment on properties for Zr-4 alloy. Keywords: Zr alloy, Heat Treatment, mechanical propert

Precipitates Formation in Ti-Ni Equiatomic Alloys due to Annealing Heat Treatment

2010 ◽  
Vol 643 ◽  
pp. 49-54 ◽  
Author(s):  
Carlos Augusto Nascimento Oliveira ◽  
Euclides Apolinário Cabral De Pina ◽  
Cezar Henrique Gonzalez ◽  
Carlos José de Araújo ◽  
U.S.L. Filho ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Martensitic Transformation ◽  
Shape Memory ◽  
Martensitic Transformations ◽  
Smart Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metallurgical Investigation ◽  
Annealing Heat Treatment ◽  
Annealing Heat

The use of smart material such as Ti-Ni in actuators application requires an intense mechanical and metallurgical investigation to understand its behavior. This paper studies martensitic transformation using DSC and X-ray diffraction techniques to compare shape memory parameters in Ti-50.2%Ni (A1) and equiatomic Ti-50.0%Ni (A2) Alloys. The as as-received samples were submitted to annealing at 400°C and 500°C for 24 hours then quenched in at 25°C. The influence of heat treatment on martensitic transformations temperatures and the appearance of R-phase were analyzed using DSC and X-ray diffraction.

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