In situ assessment of lattice strain in an Al-Li alloy

Abstract The lattice strains of individual grains are measured in an Al–Li alloy, AA 2195, using high-energy X-ray diffraction at a synchrotron source. The diffraction of individual grains in this highly textured production alloy was isolated through use of a depth-defining aperture. It is shown that hydrostatic stress, and in turn the stress triaxiality, can vary significantly from grain to grain.

[1]  H. Garmestani,et al.  Modeling the evolution of anisotropy in Al–Li alloys: application to Al–Li 2090-T8E41 , 2002 .

[2]  E. Lauridsen,et al.  X-ray microscopy in four dimensions , 2006 .

[3]  W. Hume-rothery,et al.  The lattice spacings of solid solutions of different elements in aluminium , 1948, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[4]  M. Domack,et al.  EBSD Study of Delamination Fracture in Al–Li Alloy 2090 , 2010 .

[5]  O. Es-Said,et al.  Effect of Stretch Orientation and Rolling Orientation on the Mechanical Properties of 2195 Al-Cu-Li Alloy , 2011 .

[6]  D. Lloyd,et al.  Deformation and fracture in Al–Li-base alloys , 1986 .

[7]  R. J. McDonald,et al.  Experimental Characterization of Damage Processes in Aluminum AA2024-O , 2010 .

[8]  M. A. Przystupa,et al.  On through thickness crystallographic texture gradient in Al-Li-Cu-Zr alloy , 1988 .

[9]  Kumar V. Jata,et al.  Fatigue crack growth and fracture toughness behavior of an Al-Li-Cu alloy , 1986 .

[10]  P. Gregson,et al.  Microstructural control of toughness in aluminium-lithium alloys , 1985 .

[11]  Henning Friis Poulsen,et al.  Lattice rotations of individual bulk grains. Part I: 3D X-ray characterization , 2003 .

[12]  R. Wanhill,et al.  Low-energy intergranular fracture in Al–Li alloys , 2012 .

[13]  T. Wierzbicki,et al.  On fracture locus in the equivalent strain and stress triaxiality space , 2004 .

[14]  S. Kweon,et al.  Damage at negative triaxiality , 2012 .

[15]  E. Lee,et al.  Effect of T1 precipitate on the anisotropy of AlLi alloy 2090 , 1993 .

[16]  Nathan R. Barton,et al.  Precision of lattice strain and orientation measurements using high-energy monochromatic X-ray diffraction , 2011 .

[17]  E. A. Starke,et al.  The Effect of Inhomogeneous Plastic Deformation on the Ductility and Fracture Behavior of Age Hardenable Aluminum Alloys , 2005 .

[18]  W. Tayon.  Exploration of incompatibility in Al-Li alloys using high energy diffraction microscopy and a crystal plasticity model , 2012 .

[19]  H. Poulsen,et al.  A conical slit for three-dimensional XRD mapping. , 2000, Journal of synchrotron radiation.

[20]  Alan L. Mackay,et al.  Quaternion transformation of molecular orientation , 1984 .

[21]  T. Ericsson,et al.  Anisotropy of elastic properties in various aluminium-lithium sheet alloys , 1996 .

[22]  G. Johnson,et al.  Lattice refinement strategies. , 2012, Acta crystallographica. Section A, Foundations of crystallography.

[23]  R. Ritchie,et al.  Fatigue of aluminium—lithium alloys , 1992 .

[24]  H. Poulsen,et al.  Strain tensor development in a single grain in the bulk of a polycrystal under loading , 2002 .

[25]  R. Rioja,et al.  Fabrication methods to manufacture isotropic Al-Li alloys and products for space and aerospace applications , 1998 .