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Open AccessJournal ArticleDOI

Machinability of titanium alloys (Ti6Al4V and Ti555.3)

Pedro José Arrazola, +5 more
- 01 Mar 2009 - 
- Vol. 209, Iss: 5, pp 2223-2230
TLDR
In this paper, the machinability of near-beta titanium alloys like Ti555.3 compared with the commonly used Ti6Al4V was analyzed and a correlation between the mechanical properties of work material, tool wear, and component forces was found.
About: 
This article is published in Journal of Materials Processing Technology.The article was published on 2009-03-01 and is currently open access. It has received 473 citations till now. The article focuses on the topics: Machinability & Tool wear.

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Recent advances in the development of aerospace materials

Xuesong Zhang, +2 more
- 01 Feb 2018 - 
TL;DR: In this paper, the authors focus on the following topics: (1) materials requirements in design of aircraft structures and engines, (2) recent advances in the development of aerospace materials, (3) challenges faced by recent aerospace materials and (4) future trends in aerospace materials.
Journal ArticleDOI

Modified material constitutive models for serrated chip formation simulations and experimental validation in machining of titanium alloy Ti–6Al–4V

Mohammad Sima, +1 more
- 01 Nov 2010 - 
TL;DR: In this article, the effect of material constitutive models and elastic-viscoplastic finite element formulation on serrated chip formation for modeling of machining Ti-6Al-4V titanium alloy is investigated.
Journal ArticleDOI

High performance cutting of advanced aerospace alloys and composite materials

Rachid M'Saoubi, +7 more
- 01 Jan 2015 - 
TL;DR: An overview of the recent advances in high performance cutting of aerospace alloys and composite currently used in aeroengine and aerostructure applications is presented in this paper, focusing on the role of hybrid machining processes and cooling strategies (MQL, high pressure coolant, cryogenic) on machining performance.
Journal ArticleDOI

Problems and solutions in machining of titanium alloys

Alokesh Pramanik
- 01 Feb 2014 - 
TL;DR: In this article, the underlying mechanisms of basic challenges, such as variation of chip thickness, high heat stress, high pressure loads, springback, and residual stress based on the available literature are investigated.
Journal ArticleDOI

Welding and Joining of NiTi Shape Memory Alloys: A Review

João Pedro Oliveira, +3 more
- 01 Jul 2017 - 
TL;DR: In this article, a detailed review of welding and joining processes applied to NiTi, in similar and dissimilar combinations considering both fusion and solid-state processes, is presented, and a special section is devoted to this technique.
References
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Journal ArticleDOI

Machining titanium and its alloys

Xiaoping Yang, +1 more
- 01 Jan 1999 - 
TL;DR: In this paper, a review of the machining of titanium and its alloys and potential research issues is presented. But, the focus shift of market trends from military to commercial and aerospace to industry has also been reported.
Journal ArticleDOI

Tool wear in titanium machining

P.D. Hartung, +2 more
- 01 Jan 1982 - 
TL;DR: In this article, it is suggested that tool wear is greatly reduced when adhesion occurs between the tool and the chip, preventing relative sliding at the tool/chip interface, promoted by chemical reaction at the interface.
Journal ArticleDOI

Some clarifications on the mechanics of chip formation when machining titanium alloys

R. Komanduri
- 01 Feb 1982 - 
TL;DR: A critical review of the literature and machining studies on a Ti-(6Al-4V) work material at various speeds with the aid of high speed photography and in situ machining experiments inside a scanning electron microscope is presented in this paper.
Journal ArticleDOI

Evaluation of principal wear mechanisms of cemented carbides and ceramics used for machining titanium alloy IMI 318

Peter A. Dearnley, +1 more
- 01 Jan 1986 - 
TL;DR: In this article, the principal wear mechanisms of ceramic and cemented carbides (coated and uncoated) used for turning Ti-6AI-4V (IMI 318) and commercial purity titanium are investigated.
Journal ArticleDOI

Properties of TIMETAL 555 (Ti-5Al-5Mo-5V-3Cr-0.6Fe)

John C. Fanning
- 01 Dec 2005 - 
TL;DR: TIMETAL 555 is a near-β titanium alloy that was designed for improved producibility and excellent mechanical property combinations, including deep hardenability as mentioned in this paper, and is a relatively new alloy.
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Emmanuel O. Ezugwu, +1 more
- 15 Aug 1997 - 

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Emmanuel O. Ezugwu, +2 more
- 10 Mar 2003 - 

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- 01 Jun 2009 - 

Key improvements in the machining of difficult-to-cut aerospace superalloys

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- 01 Mar 2011 - 
Frequently Asked Questions (14)
Q1. What contributions have the authors mentioned in the paper "Machinability of titanium alloys (ti6al4v and ti555.3)" ?

Arrazola et al. this paper presented a study of the machinability of the new alloy compared with the most common titanium alloy Ti6Al4V and Ti555.3. 

The most common titanium alloy is Ti6Al4V, which belongs to the + alloy group and accounts for more than 50% of the titanium alloy production. 

The presence of adiabatic shear bands in the chipsof Ti555.3 alloy could increase the fluctuations in the mechanical and thermal loads over the tool rake face leading to an accelerated tool wear by diffusion wear mechanism. 

Min and Youzhen (1988) claimed that with the adhesion of the workpiece material to the tool rake face, diffusion is the most active wear mechanism for almost all tool materials when machining titanium alloys, as well as the tearing of tool material particles. 

For instance, at a cutting speed (vc) of 50 m min−1, the specific cutting force (Kc) varies from 2300 N mm−2 for Ti6Al4V to 2810 N mm−2 for Ti555.3. 

The presence of carbon in the adhered material indicates that the phenomenon of diffusion of carbon from the inserts into the work material has taken place at the tool–chip interface. 

One of the latest developed alloys is the Ti555.3, which can be heat treated to high strengths, with minimum tensile strength values of above 1200 MPa. 

a crater width (KB) close to 2 times the feed (f) value was observed after machining both Ti6Al4V and Ti555.3 for 15 min at the corresponding maximum cutting speed (vc,max). 

As a future prospect, the improvement of the machinability of this alloy could be achieved through the use of different advanced tool materials and a significant modification to the process setup right from the forging process to heat treatments in particular. 

as Delfosse (2005) observed, the choice of the treatment after forging could be determined by the influence of the alloys structure (phases alpha-GB and alpha-WGB) on the fatigue properties. 

A big amount of adhered material composed by titanium (light grey) and titanium carbide (black) was observed on each insert along the cutting edge. 

This high tensile strength makes Ti555.3 a promising material for advanced structural and landing gear applications, compared with traditional titanium alloys such as Ti6Al4V. 

these near-beta titanium alloys have a poor machinability rating which needs to be overcome so as to maintain at least the same productivity levels as in Ti6Al4V. 

A suitable maximum cutting speed (vc,max) is determined for each alloy, which is the cutting speed beyond which a small increase in the cutting speed causes a rapid increase in tool wear.