Answer
Damuwa shakatawa shine asarar nauyi mai dogaro da lokaci a ƙarƙashin juzu'i na yau da kullun. A cikin bawuloli na cikin teku, ana yawan yin hakan ta yanayin zafi da ya wuce iyakar zafin kayan ko babban damuwa na farko ($\% Min Tensile $). Alamar farko ita ce 'saitin' ko raguwa a tsayi kyauta ($H_f$). A ƙididdigewa, za a iya ƙirƙira sauran nauyin $P_t$ ta amfani da alaƙar Arrhenius: $P_t = P_0 imes e^{-At imes e^{-Q/RT}}$, inda $Q$ shine kuzarin kunnawa. Binciken gazawa ya haɗa da bincika nakasar ƙananan filastik a kololuwar igiyoyin ruwa. Idan $17-7PH$ ya gaza, matsawa zuwa Inconel X-750 ko A286 ana ba da shawarar, saboda waɗannan superalloys suna tsayayya da nakasawa saboda lokacin ƙarfafa $\gamma'$ (gamma prime) wanda ya tsaya tsayin daka a mafi girman ƙarfin zafi.
