EP3212816A1 - Piece de turbomachine comportant un alliage a base de titane - Google Patents
Piece de turbomachine comportant un alliage a base de titaneInfo
- Publication number
- EP3212816A1 EP3212816A1 EP15798511.0A EP15798511A EP3212816A1 EP 3212816 A1 EP3212816 A1 EP 3212816A1 EP 15798511 A EP15798511 A EP 15798511A EP 3212816 A1 EP3212816 A1 EP 3212816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- mass content
- titanium
- part according
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/174—Titanium alloys, e.g. TiAl
Definitions
- the invention relates to novel titanium alloys having improved mechanical properties.
- titanium alloys may have low or no cold working at room temperature and a relatively low ductility (10 to 15% on average). This type of behavior is related to the hardening methods of known titanium alloys which make it possible to obtain good properties in terms of mechanical strength but, in return, can limit the deformation capacities of the material and, consequently, lead to low ductility.
- Known titanium alloys are therefore not optimal materials for producing parts that are potentially subjected to large deformations while retaining good static properties such as casings which must ensure the retention of objects in case of ingestion or bursting parts. Some of the known titanium alloys can, therefore, be removed from this type of applications in favor of significantly heavier steels.
- the invention proposes a titanium-based alloy in which one or more addition elements are present, the alloy satisfying the following conditions:
- Moéq denotes the mass content of beta-elements in the molybdenum equivalent alloy
- - - Xi
- - denotes the number of valence electrons of the element ai ai
- xi denotes the molar fraction of the element i in the alloy, the sum being made on all the elements present in the alloy
- Bo denotes the average bonding index of the covalent bonds between the titanium and the elements of addition
- Md denotes the average energy level in eV of the orbitals d corresponding to the covalent bonds between the titanium and the additive elements.
- titanium-based alloy it should be understood that titanium is the base metal of the alloy, that is to say that the alloy comprises titanium in a mass content greater than or equal to 50%, for example greater than or equal to 60%, for example greater than or equal to 70%, for example greater than or equal to 80%.
- Moeq ⁇ MoiZi
- ⁇ ⁇ denotes the mass fraction in the alloy of the element of addition i
- Mo corresponds to the ratio (betagene character of the element of addition i) / (betagenic character of Mo), the sum being made on all of the addition elements present in the alloy.
- the sum relates to both the addition elements betagens but also to the alphagene addition elements possibly present in the alloy, the latter having a coefficient Mo, negative.
- Bo quantifies the average cohesive strength of the covalent bonds between titanium and the additive elements. More precisely, the magnitude Bo is calculated as follows: Bo Xj where ⁇ denotes the molar fraction of the element i in the alloy, the sum bearing on all the elements present in the alloy. Values Bo are tabulated and are given for different addition elements in Table 2 below.
- the number in front of a chemical element is the mass content in% of this element in the alloy.
- the Ti-8.5 Cr-1.5Al alloy is a titanium-based alloy containing Cr in a mass content equal to 8.5% and Al in a mass content equal to
- the alloys according to the invention advantageously have a high work hardening, a high breaking load and good ductility.
- the choice of the ranges of parameters explained above makes it possible to harden the alloy and to activate deformation modes making it possible to obtain a high ductility by involving twinning and phase-to-phase transformation mechanisms. at.
- TWIP plasticity effect induced by twinning
- TRIP plasticity effect induced by phase transformation
- the alloys according to the invention can in particular have ductilities of the order of 40% while retaining high elasticity limits (beyond 500 MPa). Such performances are in technological break with the performance of known titanium alloys.
- the alloy may comprise at least one addition element chosen from the following list: Cr, Al, Sn and V.
- the alloy may comprise Cr and Al as additive elements.
- the alloy may comprise Cr and Sn as additive elements.
- the alloy may comprise V and Al as additive elements.
- the alloy may be a binary alloy or a ternary alloy.
- the alloy may be a ternary Ti-Cr-Al or Ti-Cr-Sn alloy.
- the alloy may still be a ternary Ti-V-Al alloy.
- the alloy may still be a quaternary alloy, such as, for example, Ti-10V-4Cr-1Al alloy.
- the alloy may comprise Cr and Al as additive elements and the mass content of Cr in the alloy may be between 6% and 9%, for example between 7% and 9%, and the mass content of Al in the alloy can be between 1% and 3%.
- the alloy may have the following chemical formula: Ti-xCr-yAI where x is between 6 and 9, or even between 7 and 9, and y is between 1 and 3.
- the alloy may comprise Cr and Sn as additive elements and the mass content of Cr in the alloy may be between 6% and 9%, for example between 7% and 9%, and the mass content of Sn in the alloy may be between 1% and 5%.
- the alloy may have the following chemical formula: Ti-x'Cr-zSn where x 'is between 6 and 9, or even between 7 and 9, and z is between 1 and 5.
- the alloy according to the invention may, in particular, have one of the following chemical formulas:
- the mass content of Cr in the alloy may be between 7% and 9%.
- the present invention also relates to a turbomachine part comprising a titanium-based alloy, the alloy being:
- a ternary Ti-Cr-Sn alloy in which the mass content of Cr in the alloy is between 6% and 9% and the mass content of Sn in the alloy is between 1% and 5%.
- the part is a turbomachine casing, for example a turbomachine retention casing.
- the part may be formed of an alloy as defined above.
- the present invention also relates to a turbomachine comprising a part as defined above.
- FIGS. 1 and 2 represent electronic diagrams showing the positioning of examples of alloys according to the invention
- FIG. 3 shows the "TRIP" effect in which there is a phenomenon of transformation of a ⁇ phase into an ⁇ phase in an alloy according to the invention Ti-8.5 Cr-1.5AI,
- FIGS. 4A and 4B are photographs showing the twinning phenomenon in an alloy according to the invention Ti-8.5 Cr-1.5Sn, and
- FIGS. 5 and 6 show tensile test results of alloys according to the invention.
- Figures 1 and 2 are electronic diagrams on which titanium alloys have been positioned. These electronic diagrams indicate the deformation mechanisms implemented when the alloy is stressed.
- Bo is represented on the ordinate of the electronic diagrams of Figures 1 and 2. As mentioned above, Bo quantifies the average cohesion force of the covalent bonds between the titanium and the additive elements.
- Md is represented on the abscissa of the electronic diagrams of Figures 1 and 2. As mentioned above, Md denotes the average energy level of the orbitals d corresponding to the covalent bonds resulting from the interaction between the titanium and the additive elements.
- FIGS. 1 and 2 indicate various regions corresponding to the different deformation mechanisms used: slip, twinning, and martensitic transformation ("SIM Transformation”: “Stress Induced Martensitic Transformation”).
- alloys according to the invention are, as illustrated, positioned on the electronic diagrams of Figures 1 and 2 in the zone corresponding to the activation of twinning phenomena. For example, it is possible to have: 2.77 ⁇ Bo ⁇ 2.79 and 2.34 eV ⁇ Md ⁇ 2.38 eV for the alloys according to the invention.
- FIG. 3 is a photograph showing the production, in an alloy according to the invention, of a phase a "from a phase ⁇ (activation of the mechanism for transforming a phase ⁇ into a phase a" during the application of a constraint).
- the activation of such a phase transformation advantageously participates in obtaining a high ductility.
- Figures 4A and 4B show, for their part, the activation of a twinning phenomenon obtained in an alloy according to the invention which also contributes to obtaining a high ductility.
- Figure 5 shows tensile test results obtained for a Ti-8.5 Cr-1.5Al alloy.
- This alloy has a high ductility of the order of 40%, a breaking load of 1150 MPa and retains a high yield strength.
- the tensile tests carried out were carried out at ambient temperature at a strain rate of 10 -3 s -1 on test pieces 50 mm long, 0.5 mm thick and 5 mm wide.
- a Ti-8.5 Cr-1.5Al alloy ingot was made by compacting the sponge elements of titanium, chromium grains and powdered aluminum and then using the arc fusion technique. In the compacted mixture, the following mass contents were observed: Ti at 90% by weight, Cr at 8.5% by weight and Al at 1.5% by weight. This ingot was then deformed to obtain a sheet of 0.5 mm thick. This sheet was heat-treated at 900 ° C in the beta range followed by rapid cooling. Flat tensile specimens were cut from this sheet and were used in the tensile test described above in connection with FIG. 5. The expression "containing / containing a" must include "containing / containing at least one".
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1460497A FR3027921B1 (fr) | 2014-10-31 | 2014-10-31 | Alliages a base de titane presentant des proprietes mecaniques ameliorees |
| PCT/FR2015/052899 WO2016066955A1 (fr) | 2014-10-31 | 2015-10-28 | Piece de turbomachine comportant un alliage a base de titane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3212816A1 true EP3212816A1 (fr) | 2017-09-06 |
| EP3212816B1 EP3212816B1 (fr) | 2019-03-27 |
Family
ID=52392004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15798511.0A Active EP3212816B1 (fr) | 2014-10-31 | 2015-10-28 | Piece de turbomachine comportant un alliage a base de titane |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20170335435A1 (fr) |
| EP (1) | EP3212816B1 (fr) |
| JP (1) | JP6657240B2 (fr) |
| CN (1) | CN107208192B (fr) |
| BR (1) | BR112017008725B1 (fr) |
| CA (1) | CA2966052C (fr) |
| FR (1) | FR3027921B1 (fr) |
| RU (1) | RU2701779C2 (fr) |
| WO (1) | WO2016066955A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI684646B (zh) * | 2019-05-10 | 2020-02-11 | 大田精密工業股份有限公司 | 鈦合金板材及其製造方法 |
| FR3097236B1 (fr) | 2019-06-12 | 2021-05-28 | Centre Nat Rech Scient | Alliages de titane ayant des propriétés mécaniques améliorées |
| CN111326220B (zh) * | 2020-04-16 | 2023-08-15 | 重庆大学 | 一种高强韧锆钛基合金的设计方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2726954A (en) * | 1949-10-20 | 1955-12-13 | Rem Cru Titanium Inc | Titanium base alloy |
| JPS5521506A (en) * | 1978-07-28 | 1980-02-15 | Toshiba Corp | Titanium alloy |
| JPS5521507A (en) * | 1978-07-28 | 1980-02-15 | Toshiba Corp | Titanium alloy |
| JPS6250435A (ja) * | 1985-08-29 | 1987-03-05 | Natsuo Yugawa | 合金の製造方法および相安定性に優れたNi基単結晶超合金の製造方法 |
| JPH01111835A (ja) * | 1987-10-26 | 1989-04-28 | Kobe Steel Ltd | 冷間加工用低強度・高延性Ti合金 |
| US20090214345A1 (en) * | 2008-02-26 | 2009-08-27 | General Electric Company | Low pressure section steam turbine bucket |
| JP2009270163A (ja) * | 2008-05-08 | 2009-11-19 | Daido Steel Co Ltd | チタン合金 |
| FR2936172B1 (fr) * | 2008-09-22 | 2012-07-06 | Snecma | Procede de forgeage d'une piece thermomecanique en alliage de titane |
| CN102459670B (zh) * | 2009-06-29 | 2014-07-09 | 博格华纳公司 | 耐疲劳的铸造钛合金物品 |
| GB201003634D0 (en) * | 2010-03-05 | 2010-04-21 | Rolls Royce Plc | Containment casing |
| CN101935776B (zh) * | 2010-09-30 | 2012-08-22 | 洛阳双瑞精铸钛业有限公司 | 一种β钛合金材料及其制备方法 |
| US20130248061A1 (en) * | 2012-03-23 | 2013-09-26 | General Electric Company | Methods for processing titanium aluminide intermetallic compositions |
| RU2484166C1 (ru) * | 2012-03-27 | 2013-06-10 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Сплав на основе титана |
| KR101234505B1 (ko) * | 2012-11-08 | 2013-02-20 | 한국기계연구원 | 선형적 탄성변형을 하며 초고강도, 초저탄성 특성을 가지는 타이타늄 합금 |
| JP6084553B2 (ja) * | 2013-02-06 | 2017-02-22 | 株式会社神戸製鋼所 | チタン合金鍛造材およびその製造方法 |
| JP5633767B2 (ja) * | 2014-05-14 | 2014-12-03 | 学校法人新潟工科大学 | 低弾性チタン合金 |
| CN108677060B (zh) * | 2018-04-25 | 2020-12-11 | 东南大学 | 一种高强度高弹性耐热钛合金及制备方法 |
-
2014
- 2014-10-31 FR FR1460497A patent/FR3027921B1/fr active Active
-
2015
- 2015-10-28 EP EP15798511.0A patent/EP3212816B1/fr active Active
- 2015-10-28 US US15/522,998 patent/US20170335435A1/en not_active Abandoned
- 2015-10-28 RU RU2017118548A patent/RU2701779C2/ru active
- 2015-10-28 BR BR112017008725-1A patent/BR112017008725B1/pt active IP Right Grant
- 2015-10-28 JP JP2017542344A patent/JP6657240B2/ja active Active
- 2015-10-28 CA CA2966052A patent/CA2966052C/fr active Active
- 2015-10-28 CN CN201580059474.6A patent/CN107208192B/zh active Active
- 2015-10-28 WO PCT/FR2015/052899 patent/WO2016066955A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN107208192B (zh) | 2020-06-02 |
| JP6657240B2 (ja) | 2020-03-04 |
| EP3212816B1 (fr) | 2019-03-27 |
| CN107208192A (zh) | 2017-09-26 |
| WO2016066955A1 (fr) | 2016-05-06 |
| RU2017118548A (ru) | 2018-11-30 |
| BR112017008725B1 (pt) | 2021-11-03 |
| FR3027921A1 (fr) | 2016-05-06 |
| CA2966052A1 (fr) | 2016-05-06 |
| RU2701779C2 (ru) | 2019-10-01 |
| FR3027921B1 (fr) | 2025-12-05 |
| CA2966052C (fr) | 2022-11-22 |
| US20170335435A1 (en) | 2017-11-23 |
| BR112017008725A2 (pt) | 2018-01-30 |
| RU2017118548A3 (fr) | 2019-04-29 |
| JP2018501409A (ja) | 2018-01-18 |
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