Eutectoid Transformation in U10Mo Alloy: Effect of Deformation History and Homogenization Heat Treatment

2019 ◽  
Author(s):  
Saumyadeep Jana ◽  
Alan L. Schemer-Kohrn ◽  
Nicole R. Overman ◽  
Lucas E. Sweet ◽  
Elizabeth J. Kautz ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Eutectoid Transformation ◽  
Deformation History ◽  
Homogenization Heat Treatment ◽  
Alloy Effect

Microstructure and cavitation in the superplastic Zn-22 wt% Al alloy: Effect of solution heat treatment

1994 ◽  
Vol 70 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Kyung-Tae Park ◽  
James C. Earthman ◽  
Farghalli A. Mohamed
Keyword(s):  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Al Alloy ◽  
Alloy Effect

Microstructural modeling of the homogenization heat treatment for AA3XXX alloys

JOM ◽  
2011 ◽  
Vol 63 (7) ◽  
pp. 35-39 ◽  
Author(s):  
Qiang Du ◽  
Warren J. Poole ◽  
Mary A. Wells ◽  
Nick Parson
Keyword(s):  
Heat Treatment ◽  
Microstructural Modeling ◽  
Homogenization Heat Treatment

The Divorce Eutectoid Transformation in the Higher Mn Bearing Steel

2013 ◽  
Vol 634-638 ◽  
pp. 1798-1802 ◽  
Author(s):  
Zhi Xin Yin ◽  
Harry Bhadeshia
Keyword(s):  
Heat Treatment ◽  
Isothermal Transformation ◽  
Bearing Steel ◽  
Eutectoid Transformation ◽  
Detailed Mechanism ◽  
Bearing Steels ◽  
Original Boundary ◽  
Electronic Microscope

The detailed mechanism of divorced pearlite in bearing steels began to be actively discussed more recently. The survey of divorced pearlite in higher Mn bearing steel was carried out through scanning electronic microscope following isothermal transformation heat treatment. The results show that while divorced transformation taking place in the higher Mn bearing steel just slightly below A1, the cementite could be produced in such way as growing on the base of pre-existing cementite particles in austenite, or emerge either in globular particles or in short rod directly from the austenite. Under isothermal transformation, the carbon atoms in austenite prefer to precipitate on the original boundary of the austenite. The enough small size of the cementite particles remained in the austenite is helpful for getting spheroidal cementite particles structure through divorced eutectoid transformation.

Influence of Homogenization Heat Treatment and Cooling Modes on Microstructure of AA7475 Aluminum Alloy Ingot

2020 ◽  
Vol 989 ◽  
pp. 335-340
Author(s):  
P.L. Reznik ◽  
B.V. Ovsyannikov
Keyword(s):  
Heat Treatment ◽  
Aircraft Design ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Homogenization Heat Treatment ◽  
Different Types ◽  
Size And Morphology ◽  
Equilibrium Phases ◽  
Kinetics Of

Microstructure evolution during the homogenization heat treatment of an Al-Zn-Cu-Mg (AA7475, which is typically used for the manufacture of aircraft design) alloy, was investigated using a combination of light microscopy, scanning electron microscopy (SEM), electron probe microanalysis (EPMA), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Ingots after different types (one-or two-steps treatments) of temperatures (from 380 to 510 °C) of homogenization and cooling conditions (cooling with an air or quenching to water) were investigated. The results show that the microstructure of ingot presents a typical microstructure with some isolated Al7Cu2Fe particles, which after homogenization almost remains in both the size and morphology. The structure ingot after homogenization below 400 °C contains secondary phases, based on η (MgZn2), S (Al2CuMg) and T (Al2Mg3Zn3) are distributed along the grain boundary. In the T (Al2Mg3Zn3) phase copper dissolves up to 30 wt.%. Then the increase in temperature and the complication of heat treatment of homogenization, which led to the complication of the kinetics of the evolution of inter-dendritic phases, were found. The two-steps homogenization has a better effect than a single homogenization, as its completely dissolution of non-equilibrium phases was established.

Sign in / Sign up

Export Citation Format

Share Document