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您的检索式：作者名="Fritz Appel"
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| 1 | On the reversibility of the α_(2)/ω_(o) phase transformation in a high Nb containing TiAl alloy during high temperature deformation显示文摘The transformations between the phasesα_(2)(Ti_(3)Al)andω_(o)were investigated in a lamellar multiphase titanium aluminide alloy based onγ(TiAl).The paper complements an earlier investigation performed on the same material in which the importance of deformation-induced twin structures for theα_(2)→ω_(o) transformation was demonstrated.The present study shows that the reverse transformationω_(o)→α_(2) can also occur during high-temperature deformation.The transformation is probably triggered by constraint stresses,which exist between the different constituents due to the crystalline mismatch.The combined operation of mechanical twinning of theα_(2) phase and the reversible transformation fully converts theα_(2) lamellae into a mixture ofα_(2) andω_(o).This conversion greatly reduces the mechanical anisotropy existing in formerα_(2) lamellae.Regarding the technical use of the alloy,the stability of the converted structure with respect to further annealing was also examined.The reported processes occur at the nano-meter and sub nano-meter scale,thus,advanced characterization techniques were applied,such as high-resolution transmission electron microscopy(HRTEM)and atom probe tomography(APT). | Lin Song Fritz Appel Andreas Stark Uwe Lorenz Junyang He Zhanbing He Junpin Lin Tiebang Zhang Florian Pyczak | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 2 | Atomic level observations of mechanical damage in shot peened TiAl显示文摘 | Fritz Appel | 2013 | Philosophical Magazine (-)2013，，1： | 1 |
| 3 | INTERFACE-RELATED DEFORMATION MECHANISMS AND DISLOCATION MOBILITIES IN TWO-PHASE TITANIUM ALUMINIDE ALLOYS显示文摘INTERFACE-RELATEDDEFORMATIONMECHANISMSANDDISLOCATIONMOBILITIESINTWO-PHASETITANIUMALUMINIDEALLOYSCHRISTOPHUlrich,SPARKAUlfAPPE... | CHRISTOPH Ulrich, SPARKA Ulf APPEL Fritz, and WAGNER Richard(Institute for Materials Research, GKSS Research Center, Max-Planck-Str. ,D-21502 Geesthacht, Germany) | 1995 | Acta Metallurgica Sinica(English Letters)1995，8，Z1： | 0 |
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