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

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Abstract

Tool steels are commonly used to cut metal materials due to their distinctive hardness, resistance to abrasion and deformation. However, tool steels are challenging to be joined using conventional fusion welding process. Recently, there are many studies in the semisolid joining process of metal materials by achieving the near-globular microstructure. Most studies of semisolid processes are hinged on attaining a globular microstructure when the metal alloy is in the semisolid state. However, very less information found on the effect of direct partial re-melting (DPRM) on the microstructural evolution and mechanical properties of the semisolid joined of tool steel. 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. A thixotropic property of metal was utilised to butt-join an AISI D2 tool steel by using the infrequent method of DPRM. A high frequency of induction heating is used to apply rapid heating during the joining process, and the effect of small compression load was investigated. The microstructural analysis showed that more desirable diffusion occurred between the grains of the thixo-joint sample with 2.5 N uniaxial load. The maximum strength of the thixo-joint sample with load was higher than that of without load and the as-received samples. The average hardness value of the thixo-joint area increased to 400 HV compared to the as-received material due to the transformation of ferrite to the metastable austenite that filled by precipitated eutectic carbides at the grain boundaries.

Original languageEnglish
Pages (from-to)5006-5020
Number of pages15
JournalJournal of Mechanical Engineering and Sciences
Volume13
Issue number2
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Tool steel
Loads (forces)
Mechanical properties
Microstructure
Microstructural evolution
Metals
Joining
Melting
Hardness
Induction heating
Abrasion
Austenite
Eutectics
Ferrite
Carbides
Welding
Grain boundaries
Fusion reactions
Heating

Keywords

  • AISI D2 tool steel
  • Mechanical properties
  • Microstructure
  • Thixo-joint
  • Uniaxial load

ASJC Scopus subject areas

  • Computational Mechanics
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

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title = "Effect of uniaxial load on microstructure and mechanical properties of Thixo-joint AISI D2 tool steel",
abstract = "Tool steels are commonly used to cut metal materials due to their distinctive hardness, resistance to abrasion and deformation. However, tool steels are challenging to be joined using conventional fusion welding process. Recently, there are many studies in the semisolid joining process of metal materials by achieving the near-globular microstructure. Most studies of semisolid processes are hinged on attaining a globular microstructure when the metal alloy is in the semisolid state. However, very less information found on the effect of direct partial re-melting (DPRM) on the microstructural evolution and mechanical properties of the semisolid joined of tool steel. 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. A thixotropic property of metal was utilised to butt-join an AISI D2 tool steel by using the infrequent method of DPRM. A high frequency of induction heating is used to apply rapid heating during the joining process, and the effect of small compression load was investigated. The microstructural analysis showed that more desirable diffusion occurred between the grains of the thixo-joint sample with 2.5 N uniaxial load. The maximum strength of the thixo-joint sample with load was higher than that of without load and the as-received samples. The average hardness value of the thixo-joint area increased to 400 HV compared to the as-received material due to the transformation of ferrite to the metastable austenite that filled by precipitated eutectic carbides at the grain boundaries.",
keywords = "AISI D2 tool steel, Mechanical properties, Microstructure, Thixo-joint, Uniaxial load",
author = "F. Adnan and Zainuddin Sajuri and Omar, {Mohd. Zaidi}",
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N2 - Tool steels are commonly used to cut metal materials due to their distinctive hardness, resistance to abrasion and deformation. However, tool steels are challenging to be joined using conventional fusion welding process. Recently, there are many studies in the semisolid joining process of metal materials by achieving the near-globular microstructure. Most studies of semisolid processes are hinged on attaining a globular microstructure when the metal alloy is in the semisolid state. However, very less information found on the effect of direct partial re-melting (DPRM) on the microstructural evolution and mechanical properties of the semisolid joined of tool steel. 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. A thixotropic property of metal was utilised to butt-join an AISI D2 tool steel by using the infrequent method of DPRM. A high frequency of induction heating is used to apply rapid heating during the joining process, and the effect of small compression load was investigated. The microstructural analysis showed that more desirable diffusion occurred between the grains of the thixo-joint sample with 2.5 N uniaxial load. The maximum strength of the thixo-joint sample with load was higher than that of without load and the as-received samples. The average hardness value of the thixo-joint area increased to 400 HV compared to the as-received material due to the transformation of ferrite to the metastable austenite that filled by precipitated eutectic carbides at the grain boundaries.

AB - Tool steels are commonly used to cut metal materials due to their distinctive hardness, resistance to abrasion and deformation. However, tool steels are challenging to be joined using conventional fusion welding process. Recently, there are many studies in the semisolid joining process of metal materials by achieving the near-globular microstructure. Most studies of semisolid processes are hinged on attaining a globular microstructure when the metal alloy is in the semisolid state. However, very less information found on the effect of direct partial re-melting (DPRM) on the microstructural evolution and mechanical properties of the semisolid joined of tool steel. 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. A thixotropic property of metal was utilised to butt-join an AISI D2 tool steel by using the infrequent method of DPRM. A high frequency of induction heating is used to apply rapid heating during the joining process, and the effect of small compression load was investigated. The microstructural analysis showed that more desirable diffusion occurred between the grains of the thixo-joint sample with 2.5 N uniaxial load. The maximum strength of the thixo-joint sample with load was higher than that of without load and the as-received samples. The average hardness value of the thixo-joint area increased to 400 HV compared to the as-received material due to the transformation of ferrite to the metastable austenite that filled by precipitated eutectic carbides at the grain boundaries.

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