The validity of Matthiessen's rule in dilute al alloys in the vicinity of room temperature

The electrical resistivity and the absolute temperature coefficient at room temperature were measured on a set of dilute Al alloys. It is shown that in the case of Al-Mn and Al-Cr solid solutions a deviation from Matthiessen's rule exists even in the vicinity of room temperature. It is observed that clustering processes can cause changes in the deviation from Matthiessen's rule.