Fracture Surface Analysis in Thixojoined Tool Steels

Kalaki, Ali; Ketabchi, Mostafa; Zangeneh, Sh.

doi:10.1155/2014/489487

Cited by 4 publications

(3 citation statements)

References 10 publications

(9 reference statements)

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“…Similarly, Kalaki et al [41,42] have also carried out more effort on thixojoining with the aim to provide globular joining structure in semisolid state by employing AISI D2 and M2 tool steels via applying an approximately 1 MPa constant compressive stress at nil strength temperature of D2 and direct partial remelting in furnace with argon controlled atmosphere. Experimental results showed that the alloy with low solidus temperature in the semisolid overlap zone is highly affected by temperature experiment.…”

Section: Semisolid Diffusionmentioning

confidence: 99%

Trend and Development of Semisolid Metal Joining Processing

Mohammed

Omar

Sajuri

et al. 2015

Advances in Materials Science and Engineering

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The semisolid metal joining (SSMJ) process or thixojoining process has recently been developed based on the principles of SSM processing, which is a technology that involves the formation of metal alloys between solidus and liquidus temperatures. Thixojoining has many potential benefits, which has encouraged researchers to carry out feasibility studies on various materials that could be utilized in this process and which could transform the production of metal components. This paper reviews the findings in the literature to date in this evolving field, specifically, the experimental details, technology considerations for industrialization, and advantages and disadvantages of the various types of SSMJ methods that have been proposed. It also presents details of the range of materials that have been joined by using the SSMJ process. Furthermore, it highlights the huge potential of this process and future directions for further research.

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Section: Semisolid Diffusionmentioning

confidence: 99%

Trend and Development of Semisolid Metal Joining Processing

Mohammed

Omar

Sajuri

et al. 2015

Advances in Materials Science and Engineering

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“…It is reported that the grain boundaries at the joint region are weaker than the interior grains due to the presence of voids and carbide networks along the grain boundaries which are believed to be the reduction factors of the joint strength. In another study, Kalaki et al suggested that compression stress of 1 MPa may decrease the content of voids and strengthen the boundaries would improve the strength of the joint [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of uniaxial load on microstructure and mechanical properties of Thixo-joint AISI D2 tool steel

Adnan

Sajuri

Omar

2019

JMES

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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.

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“…A comprehensive numerical model should include effects related to the steel solidification or effects related to the flow of liquid steel within the solidified skeleton [1,2]. The existence of adequate constitutive equations, allowing the plastic behaviour of steel in high temperatures to be determined, has an impact on the result of numerical computing [1,3]. Thermal effects, such as heat generation and flow, heat exchange with the environment, or the formation and accumulation of internal stress during a change of the state of aggregation are another important aspects [2].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Hojny

Głowacki

Bała

et al. 2019

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The paper presents a multi-scale mathematical model dedicated to a comprehensive simulation of resistance heating combined with the melting and controlled cooling of steel samples. Experiments in order to verify the formulated numerical model were performed using a Gleeble 3800 thermo-mechanical simulator. The model for the macro scale was based upon the solution of Fourier-Kirchhoff equation as regards predicting the distribution of temperature fields within the volume of the sample. The macro scale solution is complemented by a functional model generating voluminal heat sources, resulting from the electric current flowing through the sample. The model for the micro-scale, concerning the grain growth simulation, is based upon the probabilistic Monte Carlo algorithm, and on the minimization of the system energy. The model takes into account the forming mushy zone, where grains degrade at the melting stage -it is a unique feature of the micro-solution. The solution domains are coupled by the interpolation of node temperatures of the finite element mesh (the macro model) onto the Monte Carlo cells (micro model).The paper is complemented with examples of resistance heating results and macro-and micro-structural tests, along with test computations concerning the estimation of the range of zones with diverse dynamics of grain growth.

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Fracture Surface Analysis in Thixojoined Tool Steels

Cited by 4 publications

References 10 publications

Trend and Development of Semisolid Metal Joining Processing

Trend and Development of Semisolid Metal Joining Processing

Effect of uniaxial load on microstructure and mechanical properties of Thixo-joint AISI D2 tool steel

Archives of Metallurgy and Materials

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