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@ARTICLE{Chen:645121,
      author       = {Chen, Hao and Chen, Huicong and Huang, Yuanding and Gan,
                      Weimin and Maawad, Emad and Xie, Weidong and Wei, Guobing
                      and Yang, Yan and Zou, Yuqin},
      title        = {{T}ension-compression asymmetry of an {AM} magnesium alloy
                      unveiled by in-situ synchrotron {X}-ray diffraction},
      journal      = {Journal of magnesium and alloys},
      volume       = {13},
      number       = {11},
      issn         = {2213-9567},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2026-00616},
      pages        = {5421 - 5437},
      year         = {2025},
      abstract     = {Magnesium (Mg) alloys typically exhibit anisotropic
                      mechanical behaviors due to their hexagonal close-packed
                      (hcp) crystal structures,often leading to
                      tension-compression asymmetries. Understanding of the
                      asymmetrical and related deformation mechanisms is crucial
                      fortheir structural applications, particularly in the
                      lightweight transportation industries. Nevertheless, the
                      underlying deformation mechanisms(e.g., slip versus
                      twinning) at each deformation stage during tension and
                      compression have not been fully understood. In this study,
                      weemployed tensile and compressive tests on extruded Al and
                      Mn containing Mg alloy, i.e., an AM alloy
                      Mg-0.6Mn-0.5Al-0.5Zn-0.4Ca, duringthe synchrotron X-ray
                      diffraction. Our results show that distinct deformation
                      behaviors and mechanisms in tension and compression
                      areassociated with the strong texture in the extruded
                      samples: (i) The tensile deformation is dominated by
                      dislocation slips, with activation ofnon-basal 〈a〉 and
                      〈c + a〉 slip, but deformation twinning is suppressed.
                      (ii) The compressive deformation shows early-stage tensile
                      twinning,followed by dislocation slips. Twinning induces
                      grain reorientation, leading to significant lattice strain
                      evolution aligned with the texture.The pronounced
                      tension-compression asymmetry is attributed to the favorable
                      shear stress direction formed in the twinning system
                      duringcompression, which facilitates the activation of
                      tensile twins. During tension, the strain hardening rate
                      (SHR) drops significantly after yieldingdue to limited
                      activated slip systems. In contrast, the samples under
                      compression exhibit significant increases in SHR after
                      yielding. Duringcompression, dislocation multiplication
                      dominates the initial strain hardening, while twinning
                      progressively contributes more significantlythan dislocation
                      slip at higher strains. This study improves our
                      understanding of the tension-compression and strain
                      hardening asymmetriesin extruded AM Mg alloys.},
      cin          = {Hereon / DOOR ; HAS-User},
      ddc          = {540},
      cid          = {I:(DE-H253)Hereon-20210428 / I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.jma.2025.10.008},
      url          = {https://bib-pubdb1.desy.de/record/645121},
}