Estimation of plain strain fracture toughness of AISI M2 steel from precracked round-bar specimens

2000 ◽  
Vol 65 (5) ◽  
pp. 559-572 ◽  
Author(s):  
B. Ule ◽  
V. Leskovšek ◽  
B. Tuma
Keyword(s):  
Fracture Toughness ◽  
Strain Fracture ◽  
Round Bar ◽  
Plain Strain

Fracture Toughness and Fatigue Behavior of T7451 Al-Zn-Mg-Cu Alloy Thick Plate

2014 ◽  
Vol 788 ◽  
pp. 223-230 ◽  
Author(s):  
Li Li Wei ◽  
Qing Lin Pan ◽  
Yi Lin Wang ◽  
Lei Feng
Keyword(s):  
Mechanical Property ◽  
Fracture Toughness ◽  
Fatigue Resistance ◽  
Fatigue Behavior ◽  
Plate Thickness ◽  
Transgranular Fracture ◽  
Cu Alloy ◽  
Tensile Fatigue ◽  
Strain Fracture ◽  
Plain Strain

The mechanical property, fracture toughness and fatigue behavior of T7451 Al-Zn-Mg-Cu alloy thick plates in different orientations and with various thicknesses were investigated by means of tensile, fatigue and plain strain fracture toughness testing. And the microstructures and fracture morphologies were analyzed with optical microscopy and scanning electron microscopy. The results showed that the samples in longitudinal (L)-transversal (T) orientation possessed better mechanical property, fracture toughness and fatigue resistance than that in T-L orientation. Fractography and optical microanalysis clearly demonstrated that the feature of recrystallized grains is the decisive factor for this anisotropy. On the other hand, values of strength and fracture toughness decreased with the increase of plate thickness, but their fatigue crack growth rate became slower. Combined with the fractography analysis, the increase of recrystallization degree and the coarser grains in the thicker plate should be the main reason for the detrimental to the strength and toughness properties since the main fracture mechanism changes from ductile transgranular fracture to intergranular failure. However, these coarse recrystallized grains play an advantageous role for fatigue resistance from crack deflection and closure perspectives.

Fracture Toughness of Structural Members

2012 ◽  
Vol 726 ◽  
pp. 195-202 ◽  
Author(s):  
Andrzej Neimitz
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Reference State ◽  
Finite Strains ◽  
Structural Members ◽  
Local Approach ◽  
Strain Fracture ◽  
Out Of Plane ◽  
Plain Strain

Abstract. In the paper several formulae to compute the fracture toughness are presented. The formulae include either parameter characterizing the in-plane constraint or out-of-plane constraint or both. The formulae are based on different assumptions and approaches to fracture mechanics. Namely, small or finite strains were assumed, global or local approach was adopted. In all cases the standard, plain strain fracture toughness was used as a reference state.

scholarly journals The impact of the temperature and exploitation time on the tensile properties and plain strain fracture toughness, KIc in characteristic areas of welded joint

2018 ◽  
Vol 12 (46) ◽  
pp. 371-382 ◽  
Author(s):  
Simon Sedmak ◽  
Ivica Čamagić ◽  
Aleksandar Sedmak ◽  
Zijah Burzić ◽  
Mihajlo Aranđelović
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Welded Joint ◽  
Strain Fracture ◽  
Plain Strain ◽  
The Impact

scholarly journals Effect of temperature and exploitation time on tensile properties and plain strain fracture toughness, KIc, in a welded joint

2018 ◽  
Vol 9 ◽  
pp. 279-286
Author(s):  
Ivica Čamagić ◽  
Simon Sedmak ◽  
Aleksandar Sedmak ◽  
Zijah Burzić ◽  
Mladen Marsenić
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Welded Joint ◽  
Effect Of Temperature ◽  
Strain Fracture ◽  
Plain Strain

Fracture Toughness of AZ61 Magnesium Alloy with Various Thickness

2015 ◽  
Vol 761 ◽  
pp. 479-483
Author(s):  
Mohd Ahadlin Mohd Daud ◽  
Nurulhilmi Zaiedah Nasir ◽  
Mohd Zulkefli Selamat ◽  
Sivakumar Dhar Malingam
Keyword(s):  
Fracture Toughness ◽  
Magnesium Alloy ◽  
Stress Intensity Factor Range ◽  
Critical Crack ◽  
Critical Crack Length ◽  
Az61 Magnesium Alloy ◽  
Critical Fracture ◽  
Strain Fracture ◽  
Plain Strain ◽  
Different Thickness

The critical fracture toughness parameterKΙCof AZ61 magnesium alloy was determined on the three point bent specimens with notch designed according to ASTM E399 standard. Five specimens having different thickness, i.e., 2, 4, 6, 8 and 10 mm were considered in order to evaluate the effect on fracture toughness. The stress intensity factor rangeΔKwas constant ~1x 10-8for every specimen until the critical crack length reached half of the width of the specimens. The fracture test was done with the speed rate 0.12-0.15 MPa√m/sec until the specimens broke. The experimental results showed that the critical plain strain fracture toughnessKΙCis 12.6 MPa√m and the highest plain stress fracture toughnessKCis 16.5 MPa√m.

CORONA 5 Alloy

Alloy Digest ◽  
1978 ◽  
Vol 27 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Density Ratio ◽  
Heat Treating ◽  
Steel Company ◽  
Specific Strength ◽  
Strain Fracture ◽  
Crucible Steel ◽  
Chloride Stress Corrosion Cracking

Abstract CORONA 5 is a titanium alloy developed for applications in fracture-controlled aircraft components. Plane strain fracture toughnesses of 110,000 to 150,000 psi sq.rt. in. (120 to 165 MPa sq.rt. m) have been produced in this alloy at 135,00 psi (930 MPa) tensile strength through a variety of different process histories. The specific strength (strength/density ratio) is superior to that of the Ti-6A1-4V alloy. Resistance to fatigue crack propagation and resistance to chloride-stress-corrosion cracking are comparable to those of Ti-6A1-4V. This datasheet provides information on composition, physical properties, microstructure, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-70. Producer or source: Crucible Steel Company of America, Titanium Division.

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