Texture evolution, phase transformation mechanism and nanohardness of selective laser melted Ti-45Al-2Cr-5Nb alloy during multi-step heat treatment process

2017 ◽  
Vol 85 ◽  
pp. 130-138 ◽  
Author(s):  
Wei Li ◽  
Jie Liu ◽  
Yan Zhou ◽  
Shifeng Wen ◽  
Jiewen Tan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Treatment Process ◽  
Texture Evolution ◽  
Heat Treatment Process ◽  
Transformation Mechanism ◽  
Evolution Phase ◽  
Step Heat Treatment

Heat Treatment and Morphology Study of Mg-Zn-Y Quasicrystal Alloys

2011 ◽  
Vol 189-193 ◽  
pp. 3824-3827
Author(s):  
Zhi Feng Wang ◽  
Wei Min Zhao ◽  
Hai Peng Li ◽  
Yue Mei Wang
Keyword(s):  
Heat Treatment ◽  
Liquid Nitrogen ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Transformation Mechanism ◽  
Morphology Study ◽  
The Matrix

Mg72.5Zn26Y1.5quasicrystal alloys were treated under different heat treatment process. The microstructures of the alloys were investigated. The quasicrystal and eutectic morphologies and their transformation during heat treatment process were detailedly studied. The results showed that lamellar and dendritic eutectic phases throughout the matrix were evidently formed under heat treatment process 310°C×30min water quenched and 310°C×30min liquid nitrogen deep cooling, respectively. Furthermore, quasicrystals of dragonfly-like and bulk polygon morphology were formed under heat treatment process 575°C×15min water quenched and 700°C×2min cooled with furnace, respectively. Various morphologies’ transformation mechanism during heat treatment process were also studied.

scholarly journals Study on phase transformation of CMnSi steel when heat treatment

2021 ◽  
Vol 1 (1) ◽  
pp. 001-005
Author(s):  
Nguyen Duong Nam ◽  
Hoang Thanh Thuy ◽  
Dinh Van Hien ◽  
Sai Manh Thang
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Treatment Process ◽  
Residual Austenite ◽  
Ferrite Matrix ◽  
Mechanical Tests ◽  
Phase Transformation Temperature ◽  
Heat Treatment Process ◽  
Strength Limit ◽  
Multi Phase

After manufacturing, if the CMnSi steel was heat treatment, it would create the multi-phase microstructure consists of highly ductility ferrite matrix, martensite, bainite and amounts of austenite. Thereby, the strength and ductility of the steel were improved. In the process of improving the quality of steel, there will be two processes: the plastic deformation process and the heat treatment process. In this paper, we present the study on the microstructure and mechanical properties of CMnSi steel which was heated. The heat treatment process of CMnSi steel is a special heat treatment process including the process of heating the steel to austenite temperature at 900 °C then keeping the heat to ensure uniformity of steel. This steel was cooled quickly from austenite temperature to phase transformation temperature which had bainite transformation equal to about 400 °C (this temperature is determined by CCT diagram). The results of microstructure analysis show that by the heat treatment process, the microstructure of steel is included three main phases: ferrite, bainite, and residual austenite. The results of mechanical tests show that after the heat treatment, the strength limit of steel is 1141 MPa, the elastic limit is 943 MPa and the elongation is 36%.

Numerical Simulation of Gradient Heat Treatment Process of Cylinder Welding Component of 30Si2MnCrMoV Steel

2013 ◽  
Vol 664 ◽  
pp. 990-995
Author(s):  
Q. Wang ◽  
W.L. Gu ◽  
D.L. Sun ◽  
X.L. Han ◽  
M.Y. Xue
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Phase Transformation ◽  
Weld Metal ◽  
Treatment Process ◽  
Axial Direction ◽  
Gradient Field ◽  
Radial Deformation ◽  
Heat Treatment Process ◽  
Partial Heating

The finite element analysis method was applied to simulate the gradient field heat treatment process of a cylinder welding component of 30Si2MnCrMoV steel by software ANSYS. In the heat treatment process，the distribution of temperature field, the variation curve of residual stress with time，the distribution of residual stress along the axial direction of cylinder, and the axial and radial deformation of the specimen were calculated and the influences of partial heating area on the distribution of temperature and residual stress were analyzed. The calculating results show that the temperature in the weld metal zone and heat affected zone of welding specimens may exceed the phase transformation points during the gradient heat temperature. The residual stress and the radial deformation in the weld metal zone were greater than those in the matrix zone. The final deformation of specimen was along the axial direction. With the increase of partial heating area, the phase transformation area was increased and the residual stress was reduced effectively.

Modeling the Effect of Chemistry Changes on Phase Transformation Timing, Hardness, and Distortion in Carburized 8620 Gear Steel

2021 ◽  
Author(s):  
Jason Meyer ◽  
Stefan Habean ◽  
Dan Londrico ◽  
Justin Sims
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Treatment Process ◽  
Low Cost ◽  
Low Carbon Steel ◽  
Alloy Element ◽  
Case Hardening ◽  
Heat Treatment Process ◽  
Low Carbon ◽  
Using Data

Abstract AISI 8620 low carbon steel is widely used due to its relatively low cost and excellent case hardening properties. The nominal chemistry of AISI 8620 can have a large range, affecting the phase transformation timing and final hardness of a carburized case. Different vendors and different heats of steel can have different chemistries under the same AISI 8620 range which will change the result of a well-established heat treatment process. Modeling the effects of alloy element variation can save countless hours and scrap costs while providing assurance that mechanical requirements are met. The DANTE model was validated using data from a previous publication and was used to study the effect of chemistry variations on hardness and phase transformation timing. Finally, a model of high and low chemistries was executed to observe the changes in hardness, retained austenite and residual stress caused by alloy variation within the validated heat treatment process.

Optimization of Heat Treatment Process of ZE41A Magnesium Alloy Using Grey- Based Taguchi Method

2008 ◽  
Vol 3 (2) ◽  
pp. 63-69
Author(s):  
M. Sivapragash ◽  
◽  
V. Sateeshkumar ◽  
P.R. Lakshminarayanan ◽  
R. Karthikeyan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Taguchi Method ◽  
Treatment Process ◽  
Heat Treatment Process

EFFECT ON HARDNESS and MICRO STRUCTURAL BEHAVIOUR OF TOOL STEEL AFTER HEAT TREATMENT PROCESS

2017 ◽  
Vol 4 (24) ◽  
Author(s):  
Karanbir Singh ◽  
Aditya Chhabra ◽  
Vaibhav Kapoor ◽  
Vaibhav Kapoor
Keyword(s):  
Heat Treatment ◽  
Empirical Study ◽  
Tool Steel ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Structural Behaviour ◽  
Treatment Processes ◽  
En 31

This study is conducted to analyze the effect on the Hardness and Micro Structural Behaviour of three Sample Grades of Tool Steel i.e. EN-31, EN-8, and D3 after Heat Treatment Processes Such As Annealing, Normalizing, and Hardening and Tempering. The purpose of Selecting Tool Steel is Because Tool Steel is Mostly Used in the Manufacturing Industry.This study is based upon the empirical study which means it is derived from experiment and observation rather than theory.

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