I te wā e hono ana te maitai ki te konumohe, ka puta he matū pakarukaru i waenga i ngā ngota Fe me Al i te wā e hono ana (IMC). Nā te noho mai o ēnei IMC ka whakawhāitihia te kaha ā-pūkaha o te hononga, nō reira me whakahaere te nui o ēnei matū. Ko te take i hangaia ai ngā IMC he ngoikore te wairewa o te Fe i roto i te Al. Mēnā ka nui ake i tētahi nui, ka pā pea ki ngā āhuatanga ā-pūkaha o te whakarewa. He āhuatanga ahurei ngā IMC pērā i te pakeke, te iti o te ngāwari me te pakari, me ngā āhuatanga āhua. Kua kitea e te rangahau, ki te whakatauritea ki ētahi atu IMC, ko te paparanga IMC Fe2Al5 e kiia whānuitia ana ko te mea tino pakarukaru (11.8± 1.8 GPa) te wāhanga IMC, ā, koinei hoki te take matua mō te hekenga o ngā āhuatanga miihini nā te korenga o te whakarewa. E rangahau ana tēnei pepa i te tukanga whakarewa laser mamao o te maitai IF me te konumohe 1050 mā te whakamahi i te laser aratau mowhiti ka taea te whakarite, ā, e rangahau ana hoki i te awe o te āhua hihi laser ki te hanganga o ngā matū whakarewa me ngā āhuatanga miihini. Mā te whakarerekē i te ōwehenga mana matua/mowhiti, i kitea i raro i te aratau arataki, ka taea e te ōwehenga mana matua/mowhiti o te 0.2 te whakatutuki i te horahanga mata hononga atanga whakarewa pai ake, me te whakaiti nui i te matotoru o te Fe2Al5 IMC, ā, ka whakapai ake i te kaha kutikuti o te hononga.
Ka whakaatuhia e tēnei tuhinga te awe o te taiaho aratau mowhiti whakarerekē ki te hanganga o ngā matū whakarewa me ngā āhuatanga miihini i te wā e whakarewahia ana te taiaho mamao o te maitai IF me te konumohe 1050. E whakaatu ana ngā hua rangahau i raro i te aratau arataki, ko te ōwehenga mana matua/mowhiti o te 0.2 ka whakarato i te horahanga mata hononga atanga whakarewa nui ake, e whakaatahia ana e te kaha kutikuti mōrahi o te 97.6 N/mm2 (te pai o te hononga o te 71%). Hei tāpiri, ki te whakatauritea ki ngā kurupae Gaussian me te ōwehenga mana nui atu i te 1, ka whakaitihia te matotoru o te matū whakarewa Fe2Al5 (IMC) mā te 62% me te matotoru katoa o te IMC mā te 40%. I roto i te aratau poka, i kitea ngā pakaru me te kaha kutikuti iti iho ki te whakatauritea ki te aratau arataki. He mea tika kia mōhiotia i kitea te whakapainga nui o te witi i roto i te hononga whakarewa i te wā i 0.5 te ōwehenga mana matua/mowhiti.
Ina he 0 te r, ko te mana porowhita anake ka whakaputaina, ina he 1 te r, ko te mana matua anake ka whakaputaina.
Kauwhata hoahoa o te ōwehenga mana r i waenga i te kurupae Gaussian me te kurupae porowhita
(a) Pūrere whakarewa; (b) Te hohonu me te whānui o te kōtaha whakarewa; (c) Hoahoa kauwhata e whakaatu ana i ngā tautuhinga tauira me ngā tautuhinga
Whakamātautau MC: Mō te kurupae Gaussian anake, i te tīmatanga kei roto te hononga whakarewa i te aratau kawe pāpaku (ID 1 me te 2), kātahi ka huri ki te aratau raka uru wāhanga (ID 3-5), me te puta mai o ngā kapiti mārama. I te pikinga o te mana mowhiti mai i te 0 ki te 1000 W, kāore he kapiti mārama i te ID 7, ā, he iti noa te hohonutanga o te whakanikoniko rino. Ina piki te mana mowhiti ki te 2000 me te 2500 W (ID 9 me te 10), ka piki ake te hohonutanga o te rohe rino momona. He nui rawa te kapiti i te mana mowhiti 2500w (ID 10).
Whakamātautau MR: Ina kei waenga i te 500 me te 1000 W te mana matua (ID 11 me te 12), kei roto te hononga whakarewa i te aratau kawe; Ki te whakataurite i te ID 12 me te ID 7, ahakoa he rite tonu te mana katoa (6000w), ka whakatinanahia e te ID 7 he aratau kōhao raka. Nā te hekenga nui o te mātotoru mana i te ID 12 nā te āhuatanga o te koropiko matua (r=0.2) tēnei. Ina tae te mana katoa ki te 7500 W (ID 15), ka taea te whakatutuki i te aratau urunga katoa, ā, ki te whakataurite ki te 6000 W e whakamahia ana i te ID 7, ka tino piki ake te mana o te aratau urunga katoa.
Whakamātautau IC: I tutuki te aratau whakahaere (ID 16 me te 17) i te mana matua 1500w me te mana mowhiti 3000w me te 3500w. Ina ko te mana matua he 3000w, ā, kei waenga i te 1500w me te 2500w te mana mowhiti (ID 19-20), ka puta he kapiti mārama i te hononga i waenga i te rino momona me te konumohe momona, ka hanga he tauira poka iti e uru ana. Ina ko te mana mowhiti he 3000 me te 3500w (ID 21 me te 22), ka tutuki te aratau poka kī uru katoa.
Ngā whakaahua whakawhiti-wāhanga o ia tautuhi whakarewa i raro i te karuārai whatu
Pikitia 4. (a) Te whanaungatanga i waenga i te kaha kume mutunga (UTS) me te ōwehenga mana i roto i ngā whakamātautau whakarewa; (b) Te mana katoa o ngā whakamātautau whakarewa katoa
Pikitia 5. (a) Te whanaungatanga i waenga i te ōwehenga āhua me te UTS; (b) Te whanaungatanga i waenga i te toronga me te hohonutanga o te urunga me te UTS; (c) Te kiato mana mō ngā whakamātautau whakarewa katoa
Pikitia 6. (ac) Mahere āwhata o te whakatōtōtanga o te pakeke iti o Vickers; (df) Ngā ira matū SEM-EDS e rite ana mō te whakarewa aratau arataki; (g) Kauwhata hoahoa o te hononga i waenga i te maitai me te konumohe; (h) Fe2Al5 me te matotoru IMC katoa o ngā whakarewa aratau arataki
Pikitia 7. (ac) Mahere āhua o te kōhaotanga o te pakeke iti o Vickers; (df) Te whānuitanga matū SEM-EDS e rite ana mō te whakarewatanga aratau kōhaotanga ā-rohe
Pikitia 8. (ac) Mahere āhua o te kōhaotanga o te pakeke iti o Vickers; (df) Te whānuitanga matū SEM-EDS e rite ana mō te whakarewatanga aratau kōhao urunga katoa
Pikitia 9. E whakaatu ana te kauwhata EBSD i te rahi o te kōhatu o te rohe whai rawa i te rino (pereti o runga) i roto i te whakamātautau aratau poka urunga katoa, ā, e ine ana i te tohatoha rahi o te kōhatu.
Pikitia 10. Ngā hihi SEM-EDS o te hononga i waenga i te rino momona me te konumohe momona
I tirotirohia e tēnei rangahau ngā pānga o te taiaho ARM ki te hanganga, te hanganga moroiti, me ngā āhuatanga hangarau o te IMC i roto i ngā hononga whakarewa rerekē o te koranu konumohe IF maitai-1050. I whakaarohia e te rangahau ētahi momo whakarewa e toru (aratau kawe, aratau urunga ā-rohe, me te aratau urunga katoa) me ētahi āhua hihi taiaho e toru kua tīpakohia (hipa Gaussian, hihi porowhita, me te hihi porowhita Gaussian). E whakaatu ana ngā hua rangahau ko te whiriwhiri i te ōwehenga mana tika o te hihi Gaussian me te hihi porowhita he tawhā matua mō te whakahaere i te hanganga me te hanganga moroiti o te waro aratau ā-roto, kia whakanuia ai ngā āhuatanga hangarau o te whakarewa. I roto i te aratau kawe, ko te hihi porowhita me te ōwehenga mana o te 0.2 e whakarato ana i te kaha whakarewa pai rawa atu (71% te pai o te hononga). I roto i te aratau poka, ka nui ake te hohonu o te whakarewa e te hihi Gaussian me te ōwehenga āhuatanga teitei ake, engari ka tino whakaitihia te kaha whakarewa. He pānga nui tō te hihi porowhita me te ōwehenga mana o te 0.5 ki te whakapai ake i ngā kongakonga taha maitai i roto i te hononga whakarewa. Nā te iti o te pāmahana tihi o te kurupae porowhita i hua ake ai te tere whakamatao, me te pānga aukati tipu o te hekenga o te Al solute ki te wāhanga o runga o te hononga whakarewa ki te hanganga witi. He hononga kaha i waenga i te pakeketanga moroiti a Vickers me te matapae a Thermo Calc mō te ōrau rōrahi wāhanga. Ko te nui ake o te ōrau rōrahi o Fe4Al13, ko te teitei ake o te pakeketanga moroiti.
Wā tuku: Hanuere-25-2024
