scholarly journals Development of Inelastic Constitutive Equations for Ni-Based Superalloy IN 738 LC. 1st Report, Inelastic Deformation Behavior at High Temperatures and Applicability of Conventional Unified Constitutive Model.

1999 ◽  
Vol 65 (634) ◽  
pp. 1314-1321
Author(s):  
Masatsugu YAGUCHI ◽  
Masato YAMAMOTO ◽  
Takashi OGATA
Keyword(s):  
Constitutive Model ◽  
High Temperatures ◽  
Constitutive Equations ◽  
Deformation Behavior ◽  
Inelastic Deformation

scholarly journals Deformation Behavior at High Temperatures in TiAl Alloys Containing TiN Particles.

1997 ◽  
Vol 44 (6) ◽  
pp. 577-581
Author(s):  
Shouichi Ochiai ◽  
Hitoshi Takeda ◽  
Yoshiro Kojima ◽  
Shunji Kikuhara
Keyword(s):  
High Temperatures ◽  
Deformation Behavior ◽  
Tial Alloys

Effects of ternary additions on the deformation behavior of single crystals of MoSi2

2000 ◽  
Vol 646 ◽  
Author(s):  
Haruyuki Inui ◽  
Koji Ishikawa ◽  
Masaharu Yamaguchi
Keyword(s):  
Yield Strength ◽  
Strain Rate ◽  
Single Crystals ◽  
Creep Strain ◽  
High Temperatures ◽  
Low Temperatures ◽  
Deformation Behavior ◽  
Creep Strain Rate ◽  
Compression Creep ◽  
Ternary Additions

ABSTRACTEffects of ternary additions on the deformation behavior of single crystals of MoSi2 with the hard [001] and soft [0 15 1] orientations have been investigated in compression and compression creep. The alloying elements studied include V, Cr, Nb and Al that form a C40 disilicide with Si and W and Re that form a C11b disilicide with Si. The addition of Al is found to decrease the yield strength of MoSi2 at all temperatures while the additions of V, Cr and Nb are found to decrease the yield strength at low temperatures and to increase the yield strength at high temperatures. In contrast, the additions of W and Re are found to increase the yield strength at all temperatures. The creep strain rate for the [001] orientation is significantly lower than that for the [0 15 1] orientation. The creep strain rate for both orientations is significantly improved by alloying with ternary elements such as Re and Nb.

A Dislocation Density Based Constitutive Model for Cyclic Deformation

1996 ◽  
Vol 118 (4) ◽  
pp. 441-447 ◽  
Author(s):  
Y. Estrin ◽  
H. Braasch ◽  
Y. Brechet
Keyword(s):  
Cyclic Loading ◽  
Dislocation Density ◽  
Constitutive Model ◽  
Constitutive Equations ◽  
Cyclic Deformation ◽  
Internal Variables ◽  
Density Evolution ◽  
Alloy 800H ◽  
Material Response ◽  
Dislocation Densities

A new constitutive model describing material response to cyclic loading is presented. The model includes dislocation densities as internal variables characterizing the microstructural state of the material. In the formulation of the constitutive equations, the dislocation density evolution resulting from interactions between dislocations in channel-like dislocation patterns is considered. The capabilities of the model are demonstrated for INCONEL 738 LC and Alloy 800H.

Fundamental Concepts of Strength of Materials

2015 ◽  
pp. 10-30
Keyword(s):  
Constitutive Model ◽  
Constitutive Equations ◽  
Virtual Work ◽  
Elementary Theory ◽  
Elastic Beam ◽  
Theory Of Elasticity ◽  
Principle Of Virtual Work ◽  
Basic Tool ◽  
Strength Of Materials

This chapter presents the concepts of strength of materials that are relevant to the analysis of frames. These are the modified Timoshenko theory of elastic beams (Sections 2.1-2.3) and the Euler-Bernoulli one (Section 2.4). These concepts are not presented as in the conventional textbooks of strength of materials. Instead, the formulations are described using the scheme that is customary in the theory of elasticity and that was described in Chapter 1 (Section 1.1.1) (i.e. in terms of kinematics, statics, and constitutive equations). Kinematics is the branch of mechanics that studies the movement of solids and structures without considering its causes. Statics studies the equilibrium of forces; the basic tool for this analysis is the principle of virtual work. The constitutive model that describes a one-to-one relationship between stresses and deformations completes the formulation of the elastic beam problem. Finally, in Section 2.5, some concepts of the elementary theory of torsion needed for the formulation of tridimensional frames are recalled.

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