Schmieden von Titan

Terlinde, G.; Witulski, T.; Fischer, Gaston

doi:10.1002/9783527611089.ch11

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“…As-cast Ti64 has a coarse grained structure [3] which is detrimental to its mechanical properties. So these two phase alloys are typically thermo-mechanically treated to break down the microstructure and cause grain refinement [4]. But this route is expensive and time consuming.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in Strain Hardening on Boron Addition in As-Cast Ti–6Al–4V Alloy

Karthikeyan

2015

Trans Indian Inst Met

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It has been previously reported that the addition of boron to Ti-6Al-4V results in significant refinement of the as-cast microstructure and enhancement in the strain hardening. However, the mechanism for the latter effect has not been adequately studied. The aim of this study was to understand the reasons for the enhancement in room temperature strain hardening on addition of boron to as cast Ti-6Al-4V alloy. A study was conducted on slip transmission using SEM, TEM, optical profilometry and four point probe resistivity measurements on un-deformed and deformed samples of Ti-6Al-4V-xB with five levels of boron. Optical profilometry was used to quantify the magnitude of offsets on slip traces which in turn provided information about the extent of planar or multiple slip. Studies on deformed samples reveal that while lath boundaries appear to easily permit dislocation slip transmission, colony boundaries are potent barriers to slip. From TEM studies it was also observed that while alloys containing lower boron underwent planar slip, deformation was more homogeneous in higher boron alloys due to multiple slip resulting from large number of colony boundaries. Multiple slip is also proposed to be the prime cause of the enhanced strain hardening.

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Section: Introductionmentioning

confidence: 99%

Enhancement in Strain Hardening on Boron Addition in As-Cast Ti–6Al–4V Alloy

Karthikeyan

2015

Trans Indian Inst Met

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Schmieden von Titan

Cited by 1 publication

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Enhancement in Strain Hardening on Boron Addition in As-Cast Ti–6Al–4V Alloy

Enhancement in Strain Hardening on Boron Addition in As-Cast Ti–6Al–4V Alloy

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