TY - JOUR A1 - Fantin, Andrea A1 - Manzoni, Anna Maria A1 - Springer, H. A1 - Kamachali, Reza Darvishi A1 - Maaß, Robert T1 - Local lattice distortions and chemical short-range order in MoNbTaW T2 - Materials Research Letters N2 - Extended X-ray absorption fine structure (EXAFS) conducted on an equiatomic MoNbTaW bcc medium-entropy alloy that was annealed at 2273 K reveals unexpectedly small 1st and 2nd shell element-specific lattice distortions. An experimental size-mismatch parameter, δexp, is determined to be ca. 50% lower than the corresponding calculated value. Around W, short-range order (SRO) preferring 4d elements in the 1st and 2nd shells persists. A Nb-W ordering is found, which is reminiscent of ordering emerging at lower temperatures in the B2(Mo,W;Ta,Nb)- and B32(Nb,W)-phases. With high-temperature ordering preferences in fcc also foreshadowing low-temperature phase, these findings suggest a general feature of high-temperature SRO. PB - Taylor & Francis KW - High Entropy Alloys KW - Short-range order KW - Lattice distortions KW - EXAFS PY - 2024 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/59816 AN - OPUS4-59816 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-598164 SN - 2166-3831 VL - 12 IS - 5 SP - 346 EP - 354 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany