Fractographic Interpretation of Subcritical Cracking in a High Strength Titanium Alloy (IMI 550)

CORROSION ◽  
1973 ◽  
Vol 29 (11) ◽  
pp. 435-441 ◽  
Author(s):  
R.J. H. WANHILL
Keyword(s):  
Titanium Alloy ◽  
Liquid Metal ◽  
Subcritical Crack Growth ◽  
Salt Water ◽  
High Strength ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition ◽  
Subcritical Fracture ◽  
Subcritical Cracking

Abstract A detailed fractographic study of subcritical crack growth in 3.5% aqueous NaCl and liquid mercury was made for IMI 550 (Ti-4AI-4Mo-2Sn-0.5Si) in an (α + β) heat treated condition. The work of Cox and Ajtchison, which showed that river markings are at high angles to genuine cleavage planes, is confirmed. Mechanisms for formation of the river markings are postulated, and a distinction is made between the cleavage topographies in salt water and mercury. Support is also found for the mechanism of liquid metal embrittlement postulated by Hancock and Ives. The overall appearance of the subcritical fracture surfaces provides an explanation for the low KISCC (salt water) customarily found for IMI 550.

FEDERATED F401.5Ni

Alloy Digest ◽  
1974 ◽  
Vol 23 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Elevated Temperatures ◽  
High Strength ◽  
Heat Treating ◽  
Casting Alloy ◽  
Aluminum Casting ◽  
Aluminum Casting Alloy ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract FEDERATED F401.5Ni is a heat-treatable aluminum casting alloy with high strength and good wear resistance in the fully heat-treated condition. It is recommended for castings requiring good strength at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-212. Producer or source: Federated Metals Corporation, ASARCO Inc..

UNS A96101

Alloy Digest ◽  
1988 ◽  
Vol 37 (3) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract UNS NO. A96101 in the heat treated condition is used primarily for enclosed bus conductor where both high strength and high electrical conductivity are desirable. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-287. Producer or source: Various aluminum companies.

USS STRUX

Alloy Digest ◽  
1960 ◽  
Vol 9 (7) ◽  
Keyword(s):  
United States ◽  
Tensile Strength ◽  
High Strength ◽  
Notch Toughness ◽  
United States Steel Corporation ◽  
Treated Condition ◽  
High Strength Level ◽  
Heat Treated ◽  
Heat Treated Condition ◽  
Very High

Abstract USS STRUX is an alloy steel designed for use in the heat treated condition at a minimum tensile strength of 280,000 psi. At this very high strength level the steel has adequate ductility and notch toughness for critical applications. This datasheet provides information on composition and tensile properties. Filing Code: SA-100. Producer or source: United States Steel Corporation.

CARTECH Ti 15V-3Cr-3Sn-3Al

Alloy Digest ◽  
2021 ◽  
Vol 70 (7) ◽  
Keyword(s):  
High Strength ◽  
Heat Treating ◽  
Beta Titanium Alloy ◽  
Treated Condition ◽  
Beta Titanium ◽  
Heat Treated ◽  
Technology Corporation ◽  
Heat Treated Condition ◽  
Carpenter Technology Corporation ◽  
Metastable Beta

Abstract CarTech Ti 15V-3Cr-3Sn-3Al (UNS R58153) is a metastable beta titanium alloy that offers substantial weight reduction in comparison with other engineering materials. If used in the solution heat treated condition, the alloy has excellent cold formability. In the aged condition, the alloy has high strength. It is acceptable for use up to 230 °C (550 °F). This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ti-180. Producer or source: Carpenter Technology Corporation.

ALUMINUM 142

Alloy Digest ◽  
1955 ◽  
Vol 4 (12) ◽  
Keyword(s):  
Elevated Temperatures ◽  
High Strength ◽  
Heat Treating ◽  
Aluminum Casting ◽  
Aluminum Casting Alloy ◽  
Temperature Performance ◽  
Aluminum Company ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract ALUMINUM 142 is a heat treatable aluminum casting alloy recommended for services at elevated temperatures. It has high strength and good wear resistance in the fully heat treated condition. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-35. Producer or source: Aluminum Company of America.

scholarly journals “Microstructure and mechanical characterisation of titanium alloy linear friction welds”

2020 ◽  
Vol 321 ◽  
pp. 04030
Author(s):  
Bertrand Flipo ◽  
Kathryn Beamish ◽  
Bryan Humphreys ◽  
Martin Wood
Keyword(s):  
Titanium Alloy ◽  
Performance Data ◽  
Metallographic Examination ◽  
Treated Condition ◽  
Heat Treated ◽  
Linear Friction ◽  
Heat Treated Condition ◽  
High Integrity ◽  
The Impact ◽  
Weld Heat

The increasing use of composite materials in new aircraft builds leads to a significant demand for titanium alloy structural parts. The increasing costs and popularity of this material, together with restrictions in supply and processing, are driving the aerospace industry to make increasingly efficient use of available material. Linear Friction Welding (LFW) is a rapid, high integrity, solid-state forging process that has the potential to decrease the buy-to-fly ratio, production time and time to market of aerostructure components. Its dependability has already been proven for the production of key components in some of the latest generation aero engines. The LFW process is yet to be used for aerostructures. This is primarily due to the LFW process not being widely known, but also due to a lack of performance data on aerostructures manufactured by LFW being available to the supply chain and design community. To address this issue, a large series of titanium alloy weldments was produced and assessed via metallographic examinations and mechanical testing in both as-welded and post-weld heat-treated condition. The matrix of experiments was able to capture the LFW process window of this titanium alloy, and to measure the impact of the parametric conditions. Metallographic examination revealed a high integrity weld free from contaminants and oxides at the weld interface; with a characteristic recrystallised Widmanstätten martensitic Beta weld centre zone microstructure, in as welded condition, and a finegrained equiaxed recrystallised to alpha-beta microstructure in post-weld heat-treated condition. As-welded joints were tested under tensile and alternating fatigue conditions to provide an extended set of joint performance data. Joints demonstrated tensile performance equivalent to that of the parent material in all cases, with near-parent fatigue properties and improved (reduced) fatigue scatter in the post-weld heat-treated condition.

TIMKEN HS-220

Alloy Digest ◽  
1959 ◽  
Vol 8 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Roller Bearing ◽  
High Hardness ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract HS-220 is a high strength steel designed for minimum tensile strength level of 220,000 psi in the heat treated condition. It exhibits good ductility and impact values consistent with the high hardness. This datasheet provides information on composition, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-92. Producer or source: Timken Roller Bearing Company.

TIMKEN HS-260

Alloy Digest ◽  
1961 ◽  
Vol 10 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Roller Bearing ◽  
High Hardness ◽  
High Strength ◽  
Heat Treating ◽  
Temperature Performance ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract HS-260 is a high strength steel designed for minimum tensile strength level of 260,000 psi in the heat treated condition. It exhibits good ductility and impact values consistent with the high hardness. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-117. Producer or source: Timken Roller Bearing Company.

ALUMINUM 6101

Alloy Digest ◽  
1970 ◽  
Vol 19 (1) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Strength ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Aluminum Company ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract Aluminum 6101 in the heat treated condition is used primarily for enclosed bus conductor where both high strength and high electrical conductivity are desirable. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-194. Producer or source: Aluminum Company of America. See also Alloy Digest Al-155, May 1966.

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