PSI - Issue 14

Afroz Shaikh et al. / Procedia Structural Integrity 14 (2019) 782–789 Afroz Shaikh / Structural Integrity Procedia 00 (2018) 000–000

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5. Conclusions Following type of microstructures are obtained after different heat treatment cycles,

HT 1

HT 2

HT 3

Martensitic structure consists αʹ, and transformed β

Martensitic structure consists αʹ and Transformed β. Lamellar structure consists acicular α and Transformed β.

Primary α, α’ and Transformed β.

WQ

Duplex type structure consists primary equiaxed α, acicular α and Transformed β. Primary equiaxed α, acicular α and small amount of intergranular β.

Lamellar structure consists blocky and plate like acicular α and β Lamellar structure consists blocky acicular α and β.

AC

Lamellar (Plate like) structure consists α and β.

FC

Cooling rate has a significant effect on hardness. WQ possess higher hardness as compared to other cooling rates. Highest hardness is observed in heat treatment cycle HT 3 whereas lowest hardness is observed in heat treatment cycle HT 2. Acknowledgements The authors gratefully acknowledge the extended support provided to this work by KCTI (Kalyani Centre for Technology & Innovation) for providing financial funding, laboratory and library facilities. The authors also acknowledge the support provided by Bharat Forge Ltd, Pune and DSIR (Department of Scientific and Industrial Research), Govt. of India. Finally, the authors would like to express special thanks and gratitude to review committee and top management of Bharat Forge Ltd for granting the permission to publish/present the research work. References Dawari A., Kashyap B., 2015. Determination of Adiabatic Temperature Rise During High Strain Rate Deformation of Ti-6Al-4V Alloy. National Conference on Thermo-mechanical processing of Steels & 5th Gleeble User Workshop India, 9-21. Shaikh A., Kashyap B., Chauthai A., 2016. Identification of Favorable Hot Working Condition for Ti-6Al-4V Alloy. Journal of Metallurgy and Materials Science 58, 9-18. Jadhav S., Powar A., Patil S., Supare A., Farane B., Singh R., 2017. Effect of Volume Fraction of Alpha and Transformed Beta on the High Cycle Fatigue Properties of Bimodal Ti6Al4V Alloy. Materials Science and Engineering 201. Loier C., Thauvin G., Hazotte A., Simon A., 1985. Influence of Deformation on the → + Transformation Kinetics of Ti- 6wt.%Al-4wt.%V Alloy. Journal of the Less Common Metals 108, 295-312. Peter M., Hemptenmacher J., Kumpfert J., Leyens C., 2003. Structure and Properties of Titanium and Titanium Alloys, in “Titanium and Titanium Alloys: Fundamentals and Applications” . In: Leyens, C., Peter, M. (Ed.). Wiley-VCH Verlag GmbH & Co, pp. 33-35. Fan Y., Tian W., Guo Y., Sun Z., Xu J., 2016. Relationships among the Microstructure, Mechanical Properties, and Fatigue Behavior in Thin Ti6Al4V. Advances in Materials Science and Engineering. Lütjering G., Albrecht J., Lvasishin M., 1995. Influence of Cooling Rate and β Grain Size on the Tensile Properties of (α+β) Ti-Alloys. Proceedings of the 8th World Titanium Conference, 1163-1170. Peters M., Lütjering G., Ziegler G., 1982. Control of Microstructure of (α + β) Titanium Alloys. Eingegangen am 12. Donachie M., 1988. “ Titanium: A Technical Guide” . In: Braverman, J. (Ed.). American Society of Materials, Metal Park, Oh, pp. 33.