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Numerical models are developed for these three types of DRX, most of them are focused on DDRX , with sparse models on CDRX  and mostly unexploited GDRX models .
For example, CDRX was observed through rolling of fine-grained 304, austenitic stainless steel which is of low SFE , DDRX was reported for high SFE high purity Al , CDRX and DDRX can even co-exist during hot working of Mg-3Al-1Zn  or duplex stainless steel .
CDRX and DDRX were recently reviewed in an outstanding and extensive review paper , however, GDRX was not covered and the related DRX numerical models were only in brief described.
The main objective of this paper is to offer a short review of the different types of DRX observed through hot deformation for different types of metallic alloys, i.e., DDRX, CDRX and GDRX.
DDRX, moreover known as conventional DRX, is evidently the most widely studied DRX process.
There exist many of numerical models of DDRX; the majority of them work well in some preferred situations.
Even the effort of setting up for DDRx analysis can be eased by using a well-established and proven process of parameter-gathering user interviews, which ensure that every required step is understandable and completed.
Because DDRx margins are so tight, timing specifications have been generated based on "clean" signals with an assumed, nominal slew rate.
That should make the case that setting up for proper validation of a DDRx interface is a huge task, and the actual measurements, in number and complexity, are even worse.
It is constructed by experts in DDRx timing and signal integrity (rather than accountants), and basically interviews you to understand everything about your particular design necessary for successful simulation.
DDRx models are no different: designers can go to a memory suppliers' sites and get IBIS models that include the necessary constructs, such as the ODT options implemented with the IBIS "model selector" keyword.
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