scholarly journals Comparison of K-doped and pure cold-rolled tungsten sheets: As-rolled condition and recrystallization behaviour after isochronal annealing at different temperatures

2019 ◽  
Vol 85 ◽  
pp. 105047 ◽  
Author(s):  
Philipp Lied ◽  
Carsten Bonnekoh ◽  
Wolfgang Pantleon ◽  
Markus Stricker ◽  
Andreas Hoffmann ◽  
...  
Keyword(s):  
Isochronal Annealing ◽  
Different Temperatures ◽  
Cold Rolled ◽  
Rolled Condition

SANDVIK 12C27

Alloy Digest ◽  
2006 ◽  
Vol 55 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Tensile Properties ◽  
Martensitic Stainless Steel ◽  
Heat Treating ◽  
Steel Company ◽  
Cold Rolled ◽  
Rolled Condition

Abstract Sandvik 12C27 is a martensitic stainless steel for knife applications. It is supplied in both the annealed or cold-rolled condition. This datasheet provides information on composition, microstructure, hardness, and tensile properties. It also includes information on forming and heat treating. Filing Code: SS-954. Producer or source: Sandvik Steel Company.

scholarly journals Evaluation of the Austenitic Grain Growth by Thermoelectric Power Measurements

2004 ◽  
Vol 467-470 ◽  
pp. 863-868 ◽  
Author(s):  
Carlos Capdevila ◽  
Tommy De Cock ◽  
Francisca García Caballero ◽  
Carlos García-Mateo ◽  
Carlos García de Andrés
Keyword(s):  
Thermoelectric Power ◽  
Grain Growth ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Grain Sizes ◽  
Different Temperatures ◽  
Cold Rolled ◽  
The Mean ◽  
Power Measurements

The influence of the deformation grade on the recrystallised grain size has been studied in the AISI 304 stainless steel. Therefore, cold rolled samples of this material with reductions varying between 30% and 80% were annealed at different temperatures and subsequently quenched. The mean austenitic grain sizes were measured and compared. Moreover, the correlation between the variation of the thermoelectric power and the grain growth was investigated for each degree of prior deformation.

scholarly journals Heat Treatment Effect on Lath Martensite

2018 ◽  
Vol 1 (1) ◽  
pp. 26-30
Author(s):  
Enikő Réka Fábián ◽  
Áron Kótai
Keyword(s):  
Heat Treatment ◽  
Lath Martensite ◽  
Carbon Steels ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Heat Treated ◽  
Different Temperatures ◽  
Cold Rolled ◽  
Ice Water ◽  
Martensite Microstructure

Abstract During our investigation lath martensite was produced in low carbon steels by austenitization at 1200 °C/20 min, and the cooling of samples in ice water. The samples were tempered at a range of temperatures. The tempering effects on microstructure and on mechanical proprieties were investigated. Some samples with lath martensite microstructure were cold rolled and heat treated at different temperatures. Recrystallization was observed after heat treatment at 600-700 °C.

scholarly journals Grain Refinement and Improved Mechanical Properties of EUROFER97 by Thermo-Mechanical Treatments

2021 ◽  
Vol 11 (22) ◽  
pp. 10598
Author(s):  
Giulia Stornelli ◽  
Andrea Di Schino ◽  
Silvia Mancini ◽  
Roberto Montanari ◽  
Claudio Testani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Heat Treatments ◽  
Treatment Temperature ◽  
Steel Plates ◽  
Experimental Campaign ◽  
Different Temperatures ◽  
Fusion Applications ◽  
Cold Rolled

EUROFER97 steel plates for nuclear fusion applications are usually manufactured by hot rolling and subsequent heat treatments: (1) austenitization at 980 °C for 30 min, (2) rapid cooling and (3) tempering at 760 °C for 90 min. An extended experimental campaign was carried out with the scope of improving the strength of the steel without a loss of ductility. Forty groups of samples were prepared by combining cold rolling with five cold reduction ratios (20, 40, 50, 60 and 80%) and heat treatments at eight different temperatures in the range 400–750 °C (steps of 50 °C). This work reports preliminary results regarding the microstructure and mechanical properties of all the cold-rolled samples and the effects of heat treatments on the samples deformed with the greater CR ratio (80%). The strength of deformed samples decreased as heat treatment temperature increased and the change was more pronounced in the samples cold-rolled with greater CR ratios. After heat treatments at temperature up to 600 °C yield stress (YS) and ultimate tensile strength (UTS) of samples deformed with CR ratio of 80% were significantly larger than those of standard EUROFER97 but ductility was lower. On the contrary, the treatment at 650 °C produced a fully recrystallized structure with sub-micrometric grains which guarantees higher strength and comparable ductility. The work demonstrated that EUROFER97 steel can be strengthened without compromising its ductility; the most effective process parameters will be identified by completing the analyses on all the prepared samples.

Effect of isochronal annealing on CdTe and the study of electrical properties of Au–CdTe Schottky devices

2003 ◽  
Vol 81 (3) ◽  
pp. 617-624 ◽  
Author(s):  
F M Amanullah
Keyword(s):  
Electrical Properties ◽  
Single Crystal ◽  
Forward Bias ◽  
Vapour Phase ◽  
Isochronal Annealing ◽  
Single Crystal Substrate ◽  
Barrier Formation ◽  
Crystal Substrate ◽  
Different Temperatures ◽  
Schottky Devices

Single-crystal CdTe was grown with the vapour phase technique. Dice were suitably etched and then annealed in air isochronally at different temperatures (473, 573, 673, and 773 K) for the same period of time (1 h). Schottky barriers were made by vacuum evaporation of gold onto the as-grown CdTe single-crystal substrate as well as onto the isochronally annealed substrates. The physical properties of Au–CdTe devices were studied as a function of temperature by electrical methods, such as capacitance–voltage and current–voltage analysis. The isochronal annealing technique was found to produce a significant change in the electrical properties, such as barrier height, carrier concentration, ideality factor, and forward-bias threshold, of the Au–CdTe Schottky diode. The observations are discussed in terms of the various theories of Schottky barrier formation. PACS No.: 73.30ty

Recrystallization of Boron Containing and Boron-Free Low Carbon Steels Investigated by Thermoelectric Power and Hardness Measurements

2015 ◽  
Vol 812 ◽  
pp. 195-199
Author(s):  
András Mucsi ◽  
László Dévényi
Keyword(s):  
Thermoelectric Power ◽  
Carbon Steels ◽  
Low Carbon ◽  
Slow Cooling ◽  
Steel Sheets ◽  
Starting Point ◽  
Different Temperatures ◽  
Good Starting Point ◽  
Cold Rolled ◽  
Metallurgical Processes

The measurement of thermoelectric power is a powerful method to investigate the metallurgical processes occurring in steels. In this study, four low carbon cold rolled steel sheets having different composition were investigated. The cold rolled sheets were heated up at heating rate 20 °C/hour up to different temperatures, whilst the change of thermoelectric power and hardness have been measured at room temperature after slow cooling. The thermoelectric power of steels increases with temperature until the recrystallization finishes. The raise of thermoelectric power during recrystallization is ranging between 50 and 160 nV/K, depends on the composition of the sheet. Specimens consist of boron exhibit lower thermoelectric power after recrystallization than the steel without any boron, probably due to metastable borocarbide dissolution. This fact could be a good starting point to investigate the effect of boron on thermoelectric power of steels.

RIVERSIDE No. 105

Alloy Digest ◽  
1963 ◽  
Vol 12 (12) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Copper Base ◽  
Cold Rolled ◽  
Copper Base Alloy ◽  
Rolled Condition

Abstract Riverside No. 105 is a copper-base alloy having good spring strength and high electrical conductivity in the cold rolled condition. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-136. Producer or source: H. K. Porter Company Inc..

Cold Rolled Microstructure and Its Evolution during Recovery and First Recrystallisation Stages in Low Carbon Steels

2004 ◽  
Vol 467-470 ◽  
pp. 241-246 ◽  
Author(s):  
M. Díaz-Fuentes ◽  
E. Novillo ◽  
Amaia Iza-Mendia ◽  
Isabel Gutiérrez
Keyword(s):  
Deformation Texture ◽  
Carbon Steels ◽  
Subgrain Structure ◽  
Processing Conditions ◽  
Low Carbon ◽  
Electron Backscattered Diffraction ◽  
Steel Sheets ◽  
Deformation Banding ◽  
Different Temperatures ◽  
Cold Rolled

During annealing of cold rolled steel sheets, the evolution of the texture, to produce the characteristic texture of a recrystallised material, depends on a series of factors, including the starting deformation texture, composition and processing conditions. In the present work, electron backscattered diffraction (EBSD) techniques have been used to investigate the deformation substructures being developed by cold rolling into grains belonging to different texture components. The strain localisation, the deformation banding, the spread in orientation into grains with different orientations are some of the aspects that have been considered. Annealing cycles at different temperatures have also been carried out in order to promote recovery and initial stages of recrystallisation . The obtained substructures have been compared to the as-cold rolled ones. It has been observed that recovery induces the dislocation structures to arrange into subgrains. Associated to the ND fibre, a network of relatively high angle boundaries develop within the subgrain structure. The recrystallisation nuclei have been observed to evolve from such a network.

Effect of cold rolling and subsequent aging on tensile properties and thermoelastic coefficient of Ni-Span-C 902 superalloy

2020 ◽  
Vol 117 (4) ◽  
pp. 406
Author(s):  
Maryam Morakabati ◽  
Peyman Ahmadian ◽  
Mohammad Rasoul Moazami Goodarzi
Keyword(s):  
Elastic Modulus ◽  
Cold Rolling ◽  
Tensile Test ◽  
Tensile Properties ◽  
Aging Temperature ◽  
Tensile Tests ◽  
Subsequent Aging ◽  
Microstructural Evaluation ◽  
Different Temperatures ◽  
Cold Rolled

The influence of cold rolling and subsequent aging on tensile properties and thermoelastic coefficient (TEC) of Ni-Span-C 902 superalloy was investigated. The solution treated specimens conventionally cold rolled to 30–50% thickness reduction and subsequently aged at different temperatures ranging from 550 to 850 °C for 5 h. The results of room temperature tensile tests indicated that higher strength and elastic modulus are achieved by increasing the amount of reduction area from 30 to 50%. Also, the maximum tensile strength and elastic modulus are obtained in the specimens which were 50% cold-rolled and subsequently aged at 650 °C for 5 h. Microstructural evaluation revealed that fine and spherical γ’ phase with size of 80 ± 20 nm is precipitated during aging at 650 °C. By increasing aging temperature from 650 to 750 °C, coarse γ’ phase is obtained and consequently UTS is declined. The evolution of ɛ phase is observed as a result of aging at 850 °C. According to tensile test it can be demonstrated that ɛ phase decreases the UTS and increases the ductility of the alloy. Tensile test results in the range of 30–100 °C showed that by increasing the aging temperature from 550 to 650 °C, TEC increases and with increasing the amount of cold rolling from 30 to 50 pct, TEC decreases. Meanwhile the lowest TEC value is obtained with aging of the 50 pct cold-rolled specimens at 550 °C.

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