Strength and Toughness of Be12Nb, Be17 Nb2 and Two-Phase Be12Nb-Be17Nb2

1992 ◽  
Vol 273 ◽  
Author(s):  
Stephen M. Bruemmer ◽  
Bruce W. Arey ◽  
Charles H. Henager
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Temperature ◽  
Intermetallic Compounds ◽  
Compression Strength ◽  
Bend Strength ◽  
Two Phase ◽  
High Temperature Mechanical Properties ◽  
Strength And Toughness

ABSTRACTBend strength, compression strength, and fracture toughness of niobium beryllide intermetallic compounds have been assessed at temperatures from ambient to 1200°C. Hot-isostatically-pressed (HIP) Be12Nb showed significantly improved lowand high-temperature mechanical properties over vacuum-hot-pressed (VHP) material. Strengths at 20°C were 250 MPa in bending and 2750 MPa in compression with a fracture toughness of ∼4 Mpa√m, much higher than previously measured for this compound. High-temperature (≥ 1000°C) mechanical properties were also improved with bend strengths of 250 MPa at 1200°C as compared to only 70 to 100 MPa for the VHP material. However, severe pest embrittlement was detected in the HIP material at temperatures between 650 and 1000°C.

scholarly journals Deformation Twinning in Ordered Intermetallic Compounds

1988 ◽  
Vol 133 ◽  
Author(s):  
M. H. Yoo ◽  
C. L. Fu ◽  
J. K. Lee
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Temperature ◽  
Intermetallic Compounds ◽  
Deformation Twinning ◽  
Intermetallic Alloys ◽  
High Temperature Mechanical Properties ◽  
Ordered Intermetallic ◽  
Specific Calculations ◽  
Superlattice Structures

ABSTRACTMechanistic understanding of deformation twinning in ordered superlattice structures is reviewed, and the inter-relationships between twinning and generalized plastic flow or fracture toughness are discussed. While general discussions refer to all the fcc-based and bcc-based cubic and noncubic ordered intermetallic alloys, specific calculations of the energetic and kinetic aspects of deformation twinning are made for TiAl. The importance of the twin-slip conjugate relationship on high temperature mechanical properties is emphasized. Discussion is given of possible effects of macro- and micro-alloying on twinning propensity.

scholarly journals Influence of Boron Addition on High Temperature Mechanical Properties of Nb3Ir Intermetallic Compounds

2000 ◽  
Vol 41 (12) ◽  
pp. 1605-1611 ◽  
Author(s):  
Yi Tan ◽  
Chao-Li Ma ◽  
Hisao Tanaka ◽  
Akio Kasama ◽  
Ryohei Tanaka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Intermetallic Compounds ◽  
Boron Addition ◽  
High Temperature Mechanical Properties

ZIRCONIUM GR. 32

Alloy Digest ◽  
1968 ◽  
Vol 17 (4) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Cross Section ◽  
Neutron Cross Section ◽  
Heat Treating ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Excellent Corrosion Resistance

Abstract ZIRCONIUM Gr. 32 is an alloy with a low neutron cross-section, good high temperature mechanical properties and excellent corrosion resistance in water and steam. It is a reactor grade zirconium-tin alloy for corrosion resistance in irradiated water. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Zr-4. Producer or source: AMAX.

Effect of а Number of Transition Metals on the Cohesive Properties of Cr-Ni-Base Alloys

2016 ◽  
Vol 879 ◽  
pp. 1998-2002 ◽  
Author(s):  
V.N. Butrim ◽  
V.I. Razumovskiy ◽  
A.G. Beresnev ◽  
A.S. Trushnikova ◽  
I.M. Razumovskii
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
High Temperature ◽  
Ab Initio Calculations ◽  
Base Alloy ◽  
Two Phase ◽  
Alloying Additions ◽  
High Temperature Mechanical Properties ◽  
Cohesive Properties ◽  
Theoretical Predictions

We used the results of ab initio calculations to improve the high temperature mechanical properties of a Cr-Ni-base alloy (Cr-33Ni-2W-0,3Ti-0,3V, wt.%) (alloy I) with two-phase α - γ microstructure. It was established that γ – phase in Cr-Ni-base alloy (I) plays a key role in the processes of plastic deformation. By analogy with Ni-base superalloys the bulk and grain boundaries cohesion in γ – phase of the Cr-Ni-base alloy (I) were strengthened by adding a package of the “low alloying” elements (Zr, Hf, Nb, Ta) (alloy II) chosen in accordance with our theoretical predictions. We further investigated an influence of a sum (Ta, Nb, Hf, Zr) like the low alloying additions on the mechanical properties of Cr-Ni-base alloy (I). The results of mechanical testing revealed a significant strengthening of the alloy (II) in comparison with (I) at the temperature 1080 oC in accordance with our predictions. We also investigated the microstructure’s peculiarities of the alloys (I) and (II).

RMI Ti BETA-C/Pd

Alloy Digest ◽  
2001 ◽  
Vol 50 (12) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Physical And Mechanical Properties ◽  
Bend Strength ◽  
Temperature Performance ◽  
Pd Alloy

Abstract RMI Ti Beta-C/Pd alloy is a Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd alloy also referred to as Grade 20. It is a palladium-containing version of RMI Beta-C alloy possessing equivalent physical and mechanical properties, but with enhanced corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as fracture toughness and creep. It also includes information on high temperature performance. Filing Code: TI-124. Producer or source: RMI Company.

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