Creep feed grinding of gamma titanium aluminide and burn resistant titanium alloys using SiC abrasive

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Creep feed grinding of gamma titanium aluminide and burn resistant titanium alloys using SiC abrasive. / Hood, Richard; Lechner, F; Aspinwall, David; Voice, W.

In: International Journal of Machine Tools and Manufacture, Vol. 47, No. 9, 01.01.2007, p. 1486-1492.

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@article{9182ae7b4a3a47f4af5ea257c15c46df,
title = "Creep feed grinding of gamma titanium aluminide and burn resistant titanium alloys using SiC abrasive",
abstract = "Following a brief introduction to titanium alloys and their machinability, the cutting performance of a gamma titanium aluminide intermetallic (gamma-TiA1) alloy: Ti-45A1-8Nb-0.2C wt% and a burn resistant titanium (BuRTi) alloy: Ti-25V-15Cr-2A1-0.2C wt%, is compared with creep feed grinding using SiC abrasive. The work utilised 2 separate L9 Taguchi fractional factorial arrays. Typically G-ratios were a factor of similar to 10 x greater for gamma-TiA1 than BuRTi, with on average similar to 10% lower maximum power and similar to 25% lower maximum specific energy for the gamma-TiA1 alloy. A combination of a moderately high wheel speed: 35 m/s, low depth of cut: 1.25 mm and low feed rate: 150mm/min, produced the lowest average workpiece surface roughness (Ra similar to 1.4 mu m). Workpiece surface integrity evaluation indicated that with lower operating parameter levels, in particular a wheel speed of 15 m/s, surfaces free of burn and cracks could be produced, while at higher wheel speeds: 35m/s, extensive workpiece surface burn was evident, with the gamma-TiA1 alloy suffering extensive cracking. Microhardness measurements showed in some instances slightly increased workpiece surface hardness of around 50-60HK(0.025) for the BuRTi alloy and 200HK(0.025) for the gamma-TiA1 material over respective bulk hardness values of 375HK(0.025) and 400HK(0.025).(0 (C) 2006 Elsevier Ltd. All rights reserved.",
keywords = "titanium alloys, creep feed grinding, machinability",
author = "Richard Hood and F Lechner and David Aspinwall and W Voice",
year = "2007",
month = jan,
day = "1",
doi = "10.1016/j.ijmachtools.2006.10.008",
language = "English",
volume = "47",
pages = "1486--1492",
journal = "International Journal of Machine Tools and Manufacture",
issn = "0890-6955",
publisher = "Elsevier",
number = "9",

}

RIS

TY - JOUR

T1 - Creep feed grinding of gamma titanium aluminide and burn resistant titanium alloys using SiC abrasive

AU - Hood, Richard

AU - Lechner, F

AU - Aspinwall, David

AU - Voice, W

PY - 2007/1/1

Y1 - 2007/1/1

N2 - Following a brief introduction to titanium alloys and their machinability, the cutting performance of a gamma titanium aluminide intermetallic (gamma-TiA1) alloy: Ti-45A1-8Nb-0.2C wt% and a burn resistant titanium (BuRTi) alloy: Ti-25V-15Cr-2A1-0.2C wt%, is compared with creep feed grinding using SiC abrasive. The work utilised 2 separate L9 Taguchi fractional factorial arrays. Typically G-ratios were a factor of similar to 10 x greater for gamma-TiA1 than BuRTi, with on average similar to 10% lower maximum power and similar to 25% lower maximum specific energy for the gamma-TiA1 alloy. A combination of a moderately high wheel speed: 35 m/s, low depth of cut: 1.25 mm and low feed rate: 150mm/min, produced the lowest average workpiece surface roughness (Ra similar to 1.4 mu m). Workpiece surface integrity evaluation indicated that with lower operating parameter levels, in particular a wheel speed of 15 m/s, surfaces free of burn and cracks could be produced, while at higher wheel speeds: 35m/s, extensive workpiece surface burn was evident, with the gamma-TiA1 alloy suffering extensive cracking. Microhardness measurements showed in some instances slightly increased workpiece surface hardness of around 50-60HK(0.025) for the BuRTi alloy and 200HK(0.025) for the gamma-TiA1 material over respective bulk hardness values of 375HK(0.025) and 400HK(0.025).(0 (C) 2006 Elsevier Ltd. All rights reserved.

AB - Following a brief introduction to titanium alloys and their machinability, the cutting performance of a gamma titanium aluminide intermetallic (gamma-TiA1) alloy: Ti-45A1-8Nb-0.2C wt% and a burn resistant titanium (BuRTi) alloy: Ti-25V-15Cr-2A1-0.2C wt%, is compared with creep feed grinding using SiC abrasive. The work utilised 2 separate L9 Taguchi fractional factorial arrays. Typically G-ratios were a factor of similar to 10 x greater for gamma-TiA1 than BuRTi, with on average similar to 10% lower maximum power and similar to 25% lower maximum specific energy for the gamma-TiA1 alloy. A combination of a moderately high wheel speed: 35 m/s, low depth of cut: 1.25 mm and low feed rate: 150mm/min, produced the lowest average workpiece surface roughness (Ra similar to 1.4 mu m). Workpiece surface integrity evaluation indicated that with lower operating parameter levels, in particular a wheel speed of 15 m/s, surfaces free of burn and cracks could be produced, while at higher wheel speeds: 35m/s, extensive workpiece surface burn was evident, with the gamma-TiA1 alloy suffering extensive cracking. Microhardness measurements showed in some instances slightly increased workpiece surface hardness of around 50-60HK(0.025) for the BuRTi alloy and 200HK(0.025) for the gamma-TiA1 material over respective bulk hardness values of 375HK(0.025) and 400HK(0.025).(0 (C) 2006 Elsevier Ltd. All rights reserved.

KW - titanium alloys

KW - creep feed grinding

KW - machinability

U2 - 10.1016/j.ijmachtools.2006.10.008

DO - 10.1016/j.ijmachtools.2006.10.008

M3 - Article

VL - 47

SP - 1486

EP - 1492

JO - International Journal of Machine Tools and Manufacture

JF - International Journal of Machine Tools and Manufacture

SN - 0890-6955

IS - 9

ER -