Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel

2021 ◽  
Vol 63 (1) ◽  
pp. 48-54
Author(s):  
Ömer Faruk Murathan ◽  
Kemal Davut ◽  
Volkan Kilicli
Keyword(s):  
Mechanical Properties ◽  
Experimental Studies ◽  
Total Elongation ◽  
Spring Steel ◽  
Isothermal Heat Treatment ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Fine Pearlite ◽  
Silicon Spring ◽  
Start Temperature

Abstract In this study, the effect of austenitizing temperatures and low-temperature isothermal heat treatment (below martensite start temperature) on the microstructure and mechanical properties of AISI 9254 high silicon spring steel has been investigated. Experimental studies show that ultra-fine carbide-free bainite, tempered martensite and carbon enriched retained austenite could be observed in isothermally heat-treated samples where the as-received sample consisted of fine pearlite. A high tensile strength of ~2060 MPa, a total elongation of ~8 %, and absorbed energy of 105 J were achieved in a commercial high-Si steel by austempering below the Ms temperature. A good combination of strength and ductility has been obtained in prolonged austempering below the martensite start temperature (225 °C) from an austenitizing temperature of 870 °C.

scholarly journals Effect of Ca addition on the microstructure and mechanical properties of heat-treated Mg-6.0Zn-1.2Y-0.7Zr alloy

2021 ◽  
Author(s):  
Young-Gil Jung ◽  
Wonseok Yang ◽  
Yong Joo Kim ◽  
Shae.K. Kim ◽  
Young-Ok Yoon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Ca Addition ◽  
Heat Treated

Microstructure and Mechanical Properties of Heat-Treated B319 Alloy Diesel Cylinder Heads

2015 ◽  
Vol 46 (7) ◽  
pp. 3276-3286 ◽  
Author(s):  
S. K. Chaudhury ◽  
D. Apelian ◽  
P. Meyer ◽  
D. Massinon ◽  
J. Morichon
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Diesel Cylinder

Development and Characterization of Microstructure and Mechanical Properties of Heat-Treated Zr–2.5Nb Alloy for AHWR Pressure Tubes

2013 ◽  
Vol 2 (1) ◽  
pp. 20120033
Author(s):  
R. N. Singh ◽  
A. K. Bind ◽  
J. B. Singh ◽  
J. K. Chakravartty ◽  
V. Thomas Paul ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Pressure Tubes

Investigation on microstructure and mechanical properties of heat-treated Ti-47.5Al–3Nb-3.5Cr alloy

2021 ◽  
pp. 142366
Author(s):  
Shudong Zhou ◽  
Peng Peng ◽  
Yuanli Xu ◽  
Xudong Zhang ◽  
Zhikun Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated

Effect of isothermal heat treatment on microstructure and mechanical properties of Reduced Activation Ferritic Martensitic steel

2013 ◽  
Vol 435 (1-3) ◽  
pp. 128-136 ◽  
Author(s):  
K.S. Chandravathi ◽  
C.S. Sasmal ◽  
K. Laha ◽  
P. Parameswaran ◽  
M. Nandagopal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Martensitic Steel ◽  
Isothermal Heat Treatment ◽  
Microstructure And Mechanical Properties

Improving Mechanical Properties of Twin-Roll Cast AZ31 by Wire Rolling

2021 ◽  
Vol 1016 ◽  
pp. 957-963
Author(s):  
Marie Moses ◽  
Madlen Ullmann ◽  
Rudolf Kawalla ◽  
Ulrich Prahl
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rolling Texture ◽  
Total Elongation ◽  
Roll Casting ◽  
Heat Treated ◽  
Heat Treated Condition ◽  
Set Up ◽  
Twin Roll Cast ◽  
Twin Roll

Since 2018, the institute of metal forming has been studying the novel twin-roll casting (TRC) of magnesium wire at the pilot research plant set up specifically for this purpose. Light microscopic and scanning electronic investigations were carried out within this work and show the unique microstructure of twin-roll cast AZ31 magnesium alloy with grain sizes of about 10 μm ± 4 μm in centre and 39 μm ± 26 μm near the surface of the sample. By means of a short heat treatment (460 °C/15 min), segregations can be dissolved and grain size changes in centre to 19 μm ± 12 μm (increase) and near the surface to 12 μm ± 7 μm (decrease). Further, the mechanical properties of the twin-roll cast and heat-treated wire were analysed by tensile testing at room temperature. By heat treatment, the total elongation could be increased by a third whereas the strength decreases slightly. In heat-treated state, no preferred orientation is evident. In addition to the twin-roll cast and the heat-treated condition, the rolled state was analysed. For this purpose, the twin-roll cast wire was hot rolled using an oval-square calibration. After hot rolling, a dynamic recrystallization and grain refinement of the twin-roll cast wire could be achieved. It can be seen, that an increase in strength as well as in total elongation occur after wire rolling. Beside this, a rolling texture is evident.

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