Effects of Stress Level in Pre-Cracking on Fracture Toughness of SUS 304L Steel in an 8 Tesla Magnetic Field at 4K

1998 ◽  
pp. 137-144 ◽  
Author(s):  
T. Tanaka ◽  
T. Kadota ◽  
Y. Kohno ◽  
K. Shibata
Keyword(s):  
Magnetic Field ◽  
Fracture Toughness ◽  
Stress Level ◽  
Effects Of Stress ◽  
304L Steel

HYMU 80

Alloy Digest ◽  
1971 ◽  
Vol 20 (10) ◽  
Keyword(s):  
Magnetic Field ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Initial Permeability ◽  
Nickel Iron ◽  
Technology Corporation ◽  
Carpenter Technology Corporation ◽  
Low Magnetic Field ◽  
Maximum Permeability

Abstract Carpenter HYMU 80 is an unoriented 80% nickel-iron-molybdenum alloy which offers extremely high initial permeability and maximum permeability with minimum hysteresis loss at low magnetic field strengths. 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 forming, heat treating, machining, and joining. Filing Code: Ni-5. Producer or source: Carpenter Technology Corporation. Originally published May 1953, revised October 1971.

Magnetostrictive Self-Diagnosing Smart Bolts

2014 ◽  
Author(s):  
Vladislav Sevostianov
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Magnetic Fields ◽  
Hall Effect ◽  
Stress Level ◽  
Experimental Validation ◽  
Rock Bolts ◽  
Three Point Bending ◽  
Bending Loading ◽  
The Magnetic Field

The paper presents the concept of self-diagnosing smart bolts and its experimental validation. In the present research such bolts are designed, built, and experimentally tested. As a key element of the design, wires of Galfenol (alloy of iron and gallium) are used. This material shows magnetostrictive properties, and, at the same time, is sufficiently ductile to follow typical deformation of rock bolts, and is economically affordable. Two types of Galfenol were used: Ga10Fe90 and Ga17Fe83. The wires have been installed in bolts using two designs — in a drilled central hole or in a cut along the side — and the bolts were tested for generation of the magnetic field under three-point bending loading. To measure the magnetic field in the process of deformation, a magnetometer that utilizes the GMR effect was designed, built, and compared with one utilizing the Hall effect. It is shown that (1) magnetic field generated by deformation of the smart bolts at the stress level of plastic deformation is sufficient to be noticed by the proposed magnetometer; however, the magnetometer using Hall effect is insufficient; (2) Ga10Fe90 produces higher magnetic fields than Ga17Fe83; (3) the magnetic field in plastically bended bolts is relatively stable with time.

Effect of axial magnetic field on cold metal transfer arc-brazing of Ti6Al4V to 304L steel

2020 ◽  
Vol 275 ◽  
pp. 116322 ◽  
Author(s):  
Gang Mou ◽  
Xueming Hua ◽  
Min Wang ◽  
Ye Huang ◽  
Fang Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Axial Magnetic Field ◽  
Metal Transfer ◽  
Cold Metal Transfer ◽  
Cold Metal ◽  
304L Steel

About Relation Between Irradiation Hardening of Ferritic Steels and Ductile Fracture Toughness Decrease

2009 ◽  
Author(s):  
Jiri Novak
Keyword(s):  
Fracture Toughness ◽  
Temperature Dependence ◽  
Ductile Fracture ◽  
Stress Level ◽  
Deformation Theory ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Irradiation Hardening ◽  
Ductile Fracture Toughness

We showed recently that temperature dependence of the ductile fracture toughness can be predicted on the base of two assumptions: 1) assumption of constant characteristic length, 2) assumption of proportionality between J-R curve slope and deformation work in unit volume, evaluated from zero to critical strain for initiation of deformation bands determined in plane strain geometry for material modeled by deformation theory of plasticity. Temperature dependence of ductile fracture toughness results simply from temperature dependence of the stress-strain curve. Irradiation hardening changes stress-strain behavior in a qualitatively different way: It is observed that irradiation hardening to certain yield stress level changes the stress-strain curve of the material in the same way as prestraining of the unirradiated material to the same flow stress level does. Equivalence of irradiation and prestraining concerns all key properties of deformation theory; namely the secant modulus should be taken from the stress-strain curve of unirradiated material. With exception of this specific feature, the task of finding relative fracture toughness decrease by irradiation is the same as prediction of relative decrease of fracture toughness by temperature change. In the frame of the corresponding theory, relative decrease of ductile fracture toughness expressed by J-R curve slope can be obtained from the stress-strain curve of unirradiated material and irradiation hardening level. Quantitative results are presented for the weld metals 72W and 73W, studied in the Fifth Irradiation Series in the Heavy-Section Steel Irradiation Program, and compared with experimental data.

MAGNETIC FIELD SENSOR AT DIFFERENT PRE-STRESS LEVEL

2008 ◽  
Author(s):  
C. AMBROSINO ◽  
D. DAVINO ◽  
C. VISONE ◽  
A. CUTOLO ◽  
A. CUSANO ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stress Level ◽  
Magnetic Field Sensor ◽  
Field Sensor

Effects of a high magnetic field on fracture toughness at 4.2 K for austenitic stainless steels

1993 ◽  
Vol 20 ◽  
pp. 451-454 ◽  
Author(s):  
S. Murase ◽  
S. Kobatake ◽  
M. Tanaka ◽  
I. Tashiro ◽  
O. Horigami ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fracture Toughness ◽  
High Magnetic Field ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

scholarly journals The Influence of a Magnetic Field on the Fracture Toughness of Ferromagnetic Steel

2000 ◽  
Vol 41 (8) ◽  
pp. 888-892 ◽  
Author(s):  
David Michael Clatterbuck ◽  
Jin Wah Chan ◽  
John William Morris, Jr.
Keyword(s):  
Magnetic Field ◽  
Fracture Toughness ◽  
Ferromagnetic Steel

High frequency characteristics of FeCoAlO thin films combined the effects of stress and magnetic field

2011 ◽  
Vol 109 (7) ◽  
pp. 07B509 ◽  
Author(s):  
Fu Zheng ◽  
Xuan Wang ◽  
Xu Li ◽  
Jianmin Bai ◽  
Dan Wei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
High Frequency ◽  
Frequency Characteristics ◽  
Effects Of Stress

Hydrogen Effects on Fracture Toughness of Additively Manufactured Type 304L Stainless Steel

2019 ◽  
Author(s):  
Anthony McWilliams ◽  
Michael Morgan ◽  
Paul Korinko
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Tensile Properties ◽  
Energy Deposition ◽  
Deposition Process ◽  
High Density ◽  
Tensile Fracture ◽  
304L Stainless Steel ◽  
Directed Energy ◽  
304L Steel

Abstract Rectangular blocks of Type 304L stainless steel were additively manufactured (AM) using the directed energy deposition process. These samples were characterized using tensile, fracture toughness, fractography, and metallography and compared to forged Type 304L steel. The AM materials exhibited high density, tensile properties consistent with mechanically deformed stainless steel, and acceptable fracture toughness properties (> 100 Mpam) in the as fabricated and hydrogen charged (approximately 2500 appm) conditions.

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