scholarly journals 2015 Accomplishments-Tritium aging studies on stainless steel. Effects of hydrogen isotopes, crack orientation, and specimen geometry on fracture toughness

2016 ◽  
Author(s):  
Michael J. Morgan
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Hydrogen Isotopes ◽  
Specimen Geometry ◽  
Crack Orientation ◽  
Aging Studies

Effect of Hydrogen Isotopes on the Fracture Toughness Properties of Types 316L and 304L Stainless Steel Forgings

2019 ◽  
Author(s):  
Michael J. Morgan
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Yield Strength ◽  
316L Stainless Steel ◽  
Large Strain ◽  
Hydrogen Isotopes ◽  
High Yield ◽  
304L Stainless Steel ◽  
Type 316L ◽  
Type 316L Stainless Steel

Abstract Forged stainless steels are commonly used for the containment of hydrogen isotopes and fracture toughness properties are needed for structural integrity assessments. In this study, the effects of hydrogen and tritium precharging on the fracture-toughness properties of Types 316L and 304L stainless steel forgings were measured. The purpose of the study was to evaluate hydrogen and tritium effects on fracture toughness properties of: (1) Type 316 stainless steel stem-shaped and cup shaped forgings; and (2) Type 304L cylindrical block forgings with two different yield strengths. Arc-shaped fracture toughness specimens were cut from the forgings and precharged by exposing the specimens to hydrogen or tritium gas at 623K and 34.5 MPa. Tritium precharged specimens were aged at 193 K for 45 months prior to testing to build-in helium-3 from tritium decay. In the as-received condition, the J-Integral fracture toughness of the stem, cup, and block forgings were very high and exceeded 1200 kJ/m2 on average. The fracture toughness of specimens cut from the low yield strength Type 304L stainless steel block forging had the highest fracture toughness values and Type 316L stainless steel cup forging had the lowest. The reduced fracture toughness values were attributed to the large strain required to produce the cup forging and its high yield strength. Hydrogen precharging reduced the fracture toughness of the stem, cup, and block forgings to values between 34%–51% of a baseline value which was taken to be the fracture toughness value of the low yield strength block forging. Tritium precharging reduced the fracture-toughness values more than hydrogen precharging because of the effects of helium from radioactive decay of tritium. The fracture-toughness properties of tritium-precharged forgings ranged from 12% to 23% of the baseline values. In general, Type 316L stainless steel was more resistant to toughness reductions by hydrogen or tritium (and decay helium) than Type 304L stainless steel. Yield strength had only minor effects on fracture toughness for the precharged steels.

WAUKESHA ALLOY 88

Alloy Digest ◽  
1993 ◽  
Vol 42 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Nickel Base

Abstract WAUKESHA METAL NO. 88 is a corrosion resistant nickel-base alloy compounded to run against stainless steel without galling or seizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Ni-84. Producer or source: Waukesha Foundry Company. Originally published July 1963, revised February 1993.

ELECTRAFIL G-50/SS/5

Alloy Digest ◽  
1991 ◽  
Vol 40 (1) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Fracture Toughness ◽  
Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Steel Fibers ◽  
Engineering Plastics ◽  
Shielding Material

Abstract ELECTRAFIL G-50/SS/5 provides good electrical conductivity at a low loading of stainless steel fibers. It is useful as a shielding material and for current carrying parts. This datasheet provides information on physical properties, and tensile properties as well as fracture toughness. Filing Code: Cp-13. Producer or source: AKZO Engineering Plastics.

BÖHLER A911SA EXTRA

Alloy Digest ◽  
2012 ◽  
Vol 61 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Temperature Performance ◽  
Resistance To Stress ◽  
Specialty Metals

Abstract Böhler (or Boehler) A911 is a super duplex ferritic-austenitic chromium-nickel-molybdenum stainless steel with excellent resistance to stress-corrosion cracking, pitting, and crevice corrosion. This datasheet provides information on composition, physical properties, elasticity, 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: SS-1119. Producer or source: Böhler-Uddeholm Specialty Metals Inc..

BRILLIANT 2101 T-1 AP

Alloy Digest ◽  
2012 ◽  
Vol 61 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Good Balance ◽  
Steel Wires

Abstract Stoody AP stainless steel wires are all-position wires. The nickel in this product will achieve a good balance of austenite and ferrite in lean duplex stainless steels. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming and joining. Filing Code: SS-1118. Producer or source: Stoody Company.

SANDVIK 5R75

Alloy Digest ◽  
2000 ◽  
Vol 49 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance

Abstract Sandvik 5R75 is a molybdenum-containing austenitic stainless steel with titanium added to prevent intergranular corrosion by tying up the carbon. 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 and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-777. Producer or source: Sandvik Steel Company. Originally published March 2000, corrected November 2000.

AISI TYPE 303 and 303Se

Alloy Digest ◽  
1961 ◽  
Vol 10 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stainless Steels ◽  
Heat Treating ◽  
Steel Mills ◽  
Temperature Performance ◽  
Aisi Type

Abstract AISI Types 303 and 303 Se austenitic chromium nickel stainless steels to which elements have been added to improve machining and non-seizing characteristics. They are the most readily machinable of all the austenitic chromium nickel grades and are suitable for use in automatic screw machines. They are widely used to minimize seizing and galling. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-126. Producer or source: Stainless steel mills.

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