scholarly journals The Effect of Material Strain Hardening on the Determination of CTOD R-Curves Using SENB Specimens

2018 ◽  
Author(s):  
Philippa L. Moore ◽  
Wee Liam Khor
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Strain Hardening ◽  
Single Point ◽  
Rigid Rotation ◽  
Ductile Materials ◽  
Wide Range ◽  
Rotation Methods ◽  
Engineering Alloys ◽  
Rotational Factor

In ductile materials the fracture toughness is usually characterised by a tearing resistance curve, or R-curve, plotting the fracture toughness in terms of J or CTOD against crack extension. Recent research has evaluated the methods to determine CTOD in engineering alloys with a wide range of yield to tensile (Y/T) ratios for single point CTOD. This work develops the investigation into R-curves, and reviews the assumptions about SENB specimens deforming under rigid rotation, the evaluation of CTOD from J for R-curves, and the nature of tearing initiation in low Y/T ratio stainless steel, from comparisons against a series of silicone replicas cast from the SENB specimen notch during fracture toughness tests. For CTOD R-curves, the methods based on CTOD from J in ISO 12135 and ASTM E1820 gave lower and less accurate R-curves than the rigid rotation methods in BS 7448-4 and WES 1108. However, the accuracy of the BS 7448-4 formula varied for the different strain hardening materials, and overestimated the R-curves in the low tensile ratio stainless steel. Investigations into the effect of the assumption about rigid rotation in different strain hardening materials led to a rotational factor function of tensile ratio, rp sh, to be developed from numerical modelling. When this function was substituted into standard equations in place of the fixed value of rp an improvement in the accuracy of BS 7448-4 R-curves compared to replica measurements was seen for the range of strain hardening investigated, but it did not significantly improve the accuracy of the WES 1108 formula, which accounts for strain hardening in other parameters. A combination of the elastic CTOD part of the WES 1108 formula, with the plastic CTOD incorporating the modified rotational factor, was concluded to offer the optimum method to determine CTOD R-curves for a range of strain hardening materials.

REMANIT 4565S

Alloy Digest ◽  
1992 ◽  
Vol 41 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
High Strength ◽  
Heat Treating ◽  
Corrosive Media ◽  
Temperature Performance ◽  
Excellent Corrosion Resistance ◽  
Wide Range

Abstract REMANIT 4565S is a fully austenitic stainless steel which features both high strength and excellent corrosion resistance in a wide range of corrosive media. 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 and corrosion resistance as well as forming and heat treating. Filing Code: SS-529. Producer or source: Thyssen Specialty Steels Inc..

ALLMETAL ASP-11

Alloy Digest ◽  
1976 ◽  
Vol 25 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Unique Combination ◽  
Annealed Condition ◽  
Temperature Performance ◽  
Wide Range

Abstract ALLMETAL ASP-11 is a stainless steel containing 70% ferrite and 30% austenite in its standard (annealed) condition. It has a unique combination of tensile and fatigue strengths, weldability, and resistance to corrosion and wear. This combination of properties makes it suitable for a wide range of applications. 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 and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-328. Producer or source: Allmetal Screw Products Company Inc..

Precision and bias in quantitative EDS: ASTM results

1992 ◽  
Vol 50 (2) ◽  
pp. 1654-1655
Author(s):  
John J. Friel
Keyword(s):  
Stainless Steel ◽  
Quantitative Analysis ◽  
Mechanical Alloy ◽  
Dead Time ◽  
Test Program ◽  
Round Robin Test ◽  
Wide Range ◽  
American Society ◽  
Takeoff Angle ◽  
Standardless Analysis

Committee E-04 on Metallography of the American Society for Testing and Materials (ASTM) conducted an interlaboratory round robin test program on quantitative energy dispersive spectroscopy (EDS). The test program was designed to produce data on which to base a precision and bias statement for quantitative analysis by EDS. Nine laboratories were sent specimens of two well characterized materials, a type 308 stainless steel, and a complex mechanical alloy from Inco Alloys International, Inconel® MA 6000. The stainless steel was chosen as an example of a straightforward analysis with no special problems. The mechanical alloy was selected because elements were present in a wide range of concentrations; K, L, and M lines were involved; and Ta was severely overlapped with W. The test aimed to establish limits of precision that could be routinely achieved by capable laboratories operating under real world conditions. The participants were first allowed to use their own best procedures, but later were instructed to repeat the analysis using specified conditions: 20 kV accelerating voltage, 200s live time, ∼25% dead time and ∼40° takeoff angle. They were also asked to run a standardless analysis.

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.

SAE 1020

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Steel Mills ◽  
Temperature Performance ◽  
Wide Range ◽  
Cold Worked

Abstract SAE 1020 is a low-carbon steel combining good machinability, workability and weldability. It is carburized for use in case-hardened components and it is used for a wide range of applications in the hot-worked, cold-worked, normalized or quenched-and-tempered conditions. Its many uses include bolts, rods, plate applications, machinery components, case-hardened parts, spinning tools and trimming dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: CS-113. Producer or source: Carbon steel mills.

ZYMAXX

Alloy Digest ◽  
1991 ◽  
Vol 40 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Creep Resistance ◽  
Chemical Processing ◽  
Industrial Equipment ◽  
Automotive Applications ◽  
Adverse Conditions ◽  
Chemical Inertness ◽  
Wide Range

Abstract ZYMAXX provides outstanding compressive creep resistance, toughness and chemical inertness at high temperatures and pressures and under adverse conditions. They have a wide range of uses beyond chemical processing, including aerospace and automotive applications, general industrial equipment, home appliances, farm and construction equipment. This datasheet provides information on physical properties, hardness, tensile properties, and compressive strength as well as fracture toughness and creep. It also includes information on corrosion resistance. Filing Code: Cp-18. Producer or source: E. I. Dupont de Nemours & Company Inc..

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.

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