Hot deformation and processing maps of Fe–B alloy

Abstract The hot deformation behaviour of Fe–B alloy under hot compression conditions has been investigated in the temperature range of 1000–1075°C and strain rate range of 0·01–4 s−1. The results show that the maximum stress decreases with decreasing strain rate and increasing temperature, and the activation energy is 573·68 kJ mol−1. Processing maps are developed on the basis of experimental data and using the principles of dynamic materials model. The peak power dissipation efficiency domain occurs roughly in the temperature range of 1045–1075°C and strain rate range of 0·02–0·3 s−1 with a peak efficiency of power dissipation of ∼0·5, which is the optimal processing region for the investigated alloy. Microstructural observations reveal that the dynamic recrystallisation occurs in the domain. The alloy also exhibits flow instability in the temperature range of 1000–1075°C and higher strain rate (>0·5 s−1).

[1]  H. Fu,et al.  Effects of chromium addition on corrosion resistance of Fe–3.5B alloy in liquid zinc , 2011 .

[2]  Jingbo Yan,et al.  Effects of Plastic Deformation and Heat Treatment on Microstructure and Properties of High Boron Cast Steel , 2011 .

[3]  Xiang Chen,et al.  Effect of heat treatment on microstructure and mechanical properties of high boron white cast iron , 2010 .

[4]  Yimin Gao,et al.  Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron White Cast Iron , 2010 .

[5]  H. Fu,et al.  Effect of chromium concentration on microstructure and properties of Fe–3.5B alloy , 2010 .

[6]  T. Nieh,et al.  Effect of titanium on the ductilization of Fe-B alloys with high boron content , 2010 .

[7]  H. Fu,et al.  Effects of boron concentration on the corrosion resistance of Fe–B alloys immersed in 460 °C molten zinc bath , 2010 .

[8]  Jian-tao Liu,et al.  Characterization of hot deformation behavior of a new Ni-Cr-Co based P/M superalloy , 2010 .

[9]  Xiang Chen,et al.  High boron iron-based alloy and its modification , 2009 .

[10]  J. Zhong,et al.  Effect of temperature and strain rate on the compressive deformation behavior of 42CrMo steel , 2008 .

[11]  P. Kelly,et al.  Effect of variable heat treatment modes on microstructures of Fe-Cr-B cast iron alloy , 2008 .

[12]  Xiang Chen,et al.  Effect of Chromium on Microstructure and Properties of High Boron White Cast Iron , 2008 .

[13]  J. Xing,et al.  Investigations on the Cast Boron Steel Guide Roller and Its Application in Steel Wire-Rod Mill , 2008 .

[14]  M. Yao,et al.  Development of processing maps for a Ni-based superalloy , 2007 .

[15]  H. Fu,et al.  Effect of rare earth and titanium additions on the microstructures and properties of low carbon Fe–B cast steel , 2007 .

[16]  K. P. Rao,et al.  Processing maps and rate controlling mechanisms of hot deformation of electrolytic tough pitch copper in the temperature range 300–950 °C , 2005 .

[17]  F. Garner,et al.  Influence of boron on void swelling in model austenitic steels , 2004 .

[18]  Uday S. Dixit,et al.  Application of neural networks in generating processing map for hot working , 2003 .

[19]  M. Ashby,et al.  Deformation-Mechanism Maps: The Plasticity and Creep of Metals and Ceramics , 1982 .

[20]  R. Raj.  Development of a Processing Map for Use in Warm-Forming and Hot-Forming Processes , 1981 .