Evaluation of workpiece surface integrity following point grinding of advanced titanium and nickel based alloys

David Curtis; Sein Soo; David Aspinwall; Andrew L. Mantle

doi:10.1016/j.procir.2016.02.343

Evaluation of workpiece surface integrity following point grinding of advanced titanium and nickel based alloys

David Curtis, Sein Soo, David Aspinwall, Andrew L. Mantle

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Abstract

Experimental results are presented following point grinding of Ti-6Al-4V, gamma-TiAl and Udimet 720 nickel based superalloy using plain 15 mm diameter electroplated superabrasive (CBN and diamond) wheels employing 46 µm grit. Surface roughness (Ra) was typically higher by up to ~36% on Ti-6Al-4V due to greater wheel wear and workpiece smearing/re-deposited material, corresponding to significant levels of wheel loading. While Udimet 720 exhibited minimal variation in microhardness parallel to the feed direction, strain hardened surfaces of up to ~100 HK_0.025 above the bulk value were observed for γ-TiAl. In contrast, ground Ti-6Al-4V workpieces showed minor softening at the surface. Sub-surface microstructural deformation was evident in both the Ti-6Al-4V and γ-TiAl samples, which extended to a depth of ~10 µm.

Original language	English
Pages (from-to)	47-50
Number of pages	4
Journal	Procedia CIRP
Volume	45
Early online date	5 Jun 2016
DOIs	https://doi.org/10.1016/j.procir.2016.02.343
Publication status	Published - 2016
Event	3rd CIRP Conference on Surface Integrity - Charlotte, United States Duration: 8 Jun 2016 → 10 Jun 2016

Keywords

Grinding
nickel alloy
titanium

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10.1016/j.procir.2016.02.343Licence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

Curtis_et_al_Evaluation_Workpiece_Surface_Integrity_Procedia_CIRPFinal published version, 283 KBLicence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

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title = "Evaluation of workpiece surface integrity following point grinding of advanced titanium and nickel based alloys",

abstract = "Experimental results are presented following point grinding of Ti-6Al-4V, gamma-TiAl and Udimet 720 nickel based superalloy using plain 15 mm diameter electroplated superabrasive (CBN and diamond) wheels employing 46 µm grit. Surface roughness (Ra) was typically higher by up to ~36% on Ti-6Al-4V due to greater wheel wear and workpiece smearing/re-deposited material, corresponding to significant levels of wheel loading. While Udimet 720 exhibited minimal variation in microhardness parallel to the feed direction, strain hardened surfaces of up to ~100 HK0.025 above the bulk value were observed for γ-TiAl. In contrast, ground Ti-6Al-4V workpieces showed minor softening at the surface. Sub-surface microstructural deformation was evident in both the Ti-6Al-4V and γ-TiAl samples, which extended to a depth of ~10 µm.",

keywords = "Grinding, nickel alloy, titanium",

author = "David Curtis and Sein Soo and David Aspinwall and Mantle, {Andrew L.}",

year = "2016",

doi = "10.1016/j.procir.2016.02.343",

language = "English",

volume = "45",

pages = "47--50",

journal = "Procedia CIRP",

issn = "2212-8271",

publisher = "Elsevier",

note = "3rd CIRP Conference on Surface Integrity , CSI ; Conference date: 08-06-2016 Through 10-06-2016",

}

TY - JOUR

T1 - Evaluation of workpiece surface integrity following point grinding of advanced titanium and nickel based alloys

AU - Curtis, David

AU - Soo, Sein

AU - Aspinwall, David

AU - Mantle, Andrew L.

PY - 2016

Y1 - 2016

N2 - Experimental results are presented following point grinding of Ti-6Al-4V, gamma-TiAl and Udimet 720 nickel based superalloy using plain 15 mm diameter electroplated superabrasive (CBN and diamond) wheels employing 46 µm grit. Surface roughness (Ra) was typically higher by up to ~36% on Ti-6Al-4V due to greater wheel wear and workpiece smearing/re-deposited material, corresponding to significant levels of wheel loading. While Udimet 720 exhibited minimal variation in microhardness parallel to the feed direction, strain hardened surfaces of up to ~100 HK0.025 above the bulk value were observed for γ-TiAl. In contrast, ground Ti-6Al-4V workpieces showed minor softening at the surface. Sub-surface microstructural deformation was evident in both the Ti-6Al-4V and γ-TiAl samples, which extended to a depth of ~10 µm.

AB - Experimental results are presented following point grinding of Ti-6Al-4V, gamma-TiAl and Udimet 720 nickel based superalloy using plain 15 mm diameter electroplated superabrasive (CBN and diamond) wheels employing 46 µm grit. Surface roughness (Ra) was typically higher by up to ~36% on Ti-6Al-4V due to greater wheel wear and workpiece smearing/re-deposited material, corresponding to significant levels of wheel loading. While Udimet 720 exhibited minimal variation in microhardness parallel to the feed direction, strain hardened surfaces of up to ~100 HK0.025 above the bulk value were observed for γ-TiAl. In contrast, ground Ti-6Al-4V workpieces showed minor softening at the surface. Sub-surface microstructural deformation was evident in both the Ti-6Al-4V and γ-TiAl samples, which extended to a depth of ~10 µm.

KW - Grinding

KW - nickel alloy

KW - titanium

U2 - 10.1016/j.procir.2016.02.343

DO - 10.1016/j.procir.2016.02.343

M3 - Article

SN - 2212-8271

VL - 45

SP - 47

EP - 50

JO - Procedia CIRP

JF - Procedia CIRP

T2 - 3rd CIRP Conference on Surface Integrity

Y2 - 8 June 2016 through 10 June 2016

ER -

Evaluation of workpiece surface integrity following point grinding of advanced titanium and nickel based alloys

Abstract

Keywords

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