scholarly journals Heat treatment effects on three-dimensional morphology of chromium carbide in AISI D2 tool steel studied by serial sectioning method

2018 ◽  
Author(s):  
Seyedeh Mastooreh Seyedi Ghezghapan
Keyword(s):  
Heat Treatment ◽  
Chromium Carbide ◽  
Tool Steel ◽  
Treatment Effects ◽  
Three Dimensional ◽  
Serial Sectioning ◽  
Tempering Temperature ◽  
Sectioning Method ◽  
Aisi D2 ◽  
Aisi D2 Tool Steel

We developed a three-dimensional microstructure analysis system based on the manual serial sectioning method to evaluate the heat treatment effects on chromium carbide size and morphology in AISI D2 tool steel. Two heat treatment factors, austenitizing and tempering temperature were investigated. The results show that increasing in austenitizing temperature leads to further carbide precipitation after the tempering process and increasing in the tempering temperature causes precipitate smaller secondary carbides even more than the primary carbides.

Acoustic Emission and Fracture Characteristics of AISI D2 Tool Steel Tempered at Different Temperatures

2010 ◽  
Author(s):  
M. Ahmadi Najafabadi ◽  
J. Teymuri Shandi
Keyword(s):  
Heat Treatment ◽  
Acoustic Emission ◽  
Tool Steel ◽  
Cold Work ◽  
Tempering Temperature ◽  
Average Value ◽  
Different Temperatures ◽  
Aisi D2 ◽  
Cold Work Tool Steel ◽  
Ae Signals

Acoustic emission (AE) has been known as an excellent technique to monitor crack propagation and fracture mechanism. For more domination on AE behavior of materials, comprehensive knowledge on effective parameters is necessary. Heat treatment as one of the important factors on AE characteristics of a material must be considered. This investigation is primarily aimed at studying the effect of tempering heat treatment on characteristics of acoustic emission signals monitored during tension tests of a cold-work tool steel. Single edge notched samples of AISI D2 cold-work tool steel were prepared. Then, respectively annealing, austenitizing and tempering were performed. Tempering was carried out at 5 different temperatures from 0 to 575 C. Finally, samples were loaded at tension and AE signals recorded synergistically. Analyzing of the characteristics of AE signals showed that: (a) In all tempering conditions, the AECC increases slowly at the beginning and rapidly at the point of crack growth, although at higher tempering temperatures we have gradual rise in AECC plot; (b) Increasing tempering temperature, average value of AE count number, amplitude, energy and peak frequency decreases; (c) At 525 C, because of secondary hardening, average value of investigated AE parameters increase strongly and (d) analyzing the relation between fracture mode, AE characteristics and tempering temperature showed that special AE behavior of specimens tempered at 525 C is because of the transformation of retained austenite in ferritic matrix.

scholarly journals Multi-pass friction stirred clad welding of dissimilar joined AA6061 aluminium alloy and brass

2018 ◽  
Vol 12 (4) ◽  
pp. 4285-4299
Author(s):  
Nora Osman ◽  
Zainuddin Sajuri ◽  
Mohd Zaidi Omar
Keyword(s):  
Mechanical Properties ◽  
Tool Steel ◽  
Microstructural Analysis ◽  
Welding Process ◽  
Fusion Welding ◽  
Tool Steels ◽  
Aa6061 Aluminium Alloy ◽  
Aisi D2 ◽  
Semi Solid ◽  
Aisi D2 Tool Steel

Tool steels are commonly used to cut metal materials due to their distinctive hardness, resistance to abrasion and deformation. However, tool steels are difficult to be joined using conventional fusion welding process. In this study, a thixotropic property of metal was utilised to butt-join an AISI D2 tool steel by using uncommon direct partial re-melting (DPRM) method. A high frequency of induction heating is used to apply the DPRM method. From the recent study, there are many methods in achieving the globular microstructure with the success of semi-solid joining process. Though, very less information on the microstructural effect of semi-solid joining on the mechanical properties was reported. This study aims to analyse the effect of uniaxial force on the microstructural evolution and mechanical properties of the thixo-joint of D2 tool steel. The microstructural analysis showed the diffusion occurred between the grains of the thixo-joint sample with 2.5 N uniaxial force. The maximum strength of the thixo-joint sample with force was 652 MPa. This was slightly higher than the as-received sample and the thixo-joint sample without force. The average hardness value of the thixo-joint sample was 400 HV due to the transformation of ferrite to the metastable austenite.

scholarly journals Minimization of Distortion in Heat Treated AISI D2 Tool Steel: Mechanism and Distortion Analysis

2018 ◽  
Vol 20 ◽  
pp. 113-118 ◽  
Author(s):  
Tushar Sonar ◽  
Sachin Lomte ◽  
Chandrashekhar Gogte ◽  
V. Balasubramanian
Keyword(s):  
Tool Steel ◽  
Heat Treated ◽  
Distortion Analysis ◽  
Aisi D2 ◽  
Aisi D2 Tool Steel

scholarly journals Analysis of chip formation and cutting forces in end milling AISI D2 tool steel with different cutting tool geometries

2018 ◽  
Vol 178 ◽  
pp. 01016
Author(s):  
Irina Beşliu ◽  
Dumitru Amarandei ◽  
Delia Cerlincă
Keyword(s):  
Cutting Force ◽  
Tool Steel ◽  
Chip Formation ◽  
Cutting Forces ◽  
Cutting Tool ◽  
End Milling ◽  
Great Influence ◽  
Tool Geometry ◽  
Aisi D2 ◽  
Aisi D2 Tool Steel

The purpose of this study was to investigate and establish the correlations between milling tool geometry, cutting conditions, as input factors and the cutting forces variations and chips formation, as output factors when end milling of AISI D2 tool steel. The experiments were carried out using a Taguchi design array. The chip shape and microstructure and cutting force components were analyzed. The results of the study show that the cutting tool geometry has a great influence over segmented chip formation mechanism and cutting force levels.

Three-Dimensional Observation of Internal Defects in a β-Ga2O3 (001) Wafer Using the FIB–SEM Serial Sectioning Method

2020 ◽  
Vol 49 (9) ◽  
pp. 5190-5195
Author(s):  
Kenichi Ogawa ◽  
Naoya Ogawa ◽  
Ryo Kosaka ◽  
Toshiyuki Isshiki ◽  
Yongzhao Yao ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Serial Sectioning ◽  
Internal Defects ◽  
Sectioning Method

Optimization of Machining Time and Surface Quality of AISI D2 Tool Steel in WEDM Using Taguchi Methodology and Desirability Analysis

2020 ◽  
Vol 977 ◽  
pp. 27-33
Author(s):  
Carmita Camposeco-Negrete ◽  
Juan de Dios Calderón-Nájera
Keyword(s):  
Surface Roughness ◽  
Tool Steel ◽  
Cutting Parameters ◽  
Machining Time ◽  
Aisi D2 ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Aisi D2 Tool Steel ◽  
Off Time

One of the non-conventional machining processes widely used in the industry is the wire electrical discharge machining (WEDM). This process has many advantages, like the great precision and quality that can be achieved. As well as other manufacturing operations, the success of the process relies on a correct selection of the cutting parameters. The present paper outlines an experimental study to optimize the machining time and the surface roughness in WEDM of AISI D2 tool steel during roughing machining. The Taguchi methodology is used to evaluate the effects and contributions of the pulse-on time, pulse-off time, servo voltage, and wire speed, on the response variables. The desirability method is employed to define a set of cutting parameters that allows reducing both machining time and surface roughness at the same time. The pulse-on time is the most significant factor for reducing the machining time, followed by the servo voltage, the pulse-off time and the wire speed. For surface roughness, the pulse-off time is the factor with the greatest influence over the response variable. The results obtained show that the machining time is reduced by 4.65%, and the surface roughness is diminished by 4.60% when compared with the initial values that are commonly used in the machining of AISI D2 tool steel. Therefore, greater production rates can be achieved without compromising the quality of the machined parts.

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