AlxCrFe1.5MnNi0.5合金系統 ( x = 0.3，0.5 ) [34]，擁有極佳的高溫時效硬化能力，且經過高溫時效200 h仍未見軟化，為傳統合金罕見，又其加工性良好，高溫硬度高且耐氧化。本篇論文針對上述系統總加工量達80 %的滾壓材進行退火處理後，探討其退火行為。
Al0.3CrFe1.5MnNi0.5 ( Al-0.3 )合金於500 ~ 900℃退火有明顯的析出強化現象；Al0.5CrFe1.5MnNi0.5 ( Al-0.5 )合金則於500 ~ 800℃退火也有此析出強化現象，此現象由Cr5Fe6Mn8 (ρ相)析出物所貢獻。兩合金退火後硬度最高可達Hv 950以上。藉由DTA熱分析，Al-0.3合金於542℃與910℃分別有ρ相析出的放熱峰與ρ相回溶的吸熱峰；Al-0.5合金則於350℃出現一橫跨400℃的ρ相析出放熱峰且於811℃有ρ相回溶的吸熱峰。可與退火硬度相互驗證。
經退火微結構與微硬度的觀察可得，Al-0.3退火初期為BCC基地相析出ρ相而達初期析出硬化，退火中期則是基地相之BCC顆粒相再結晶而造成退火軟化，退火後期則是FCC散佈相產生相變化並析出ρ相而展現再析出硬化的效應。Al-0.5退火初期為BCC基地相析出ρ相而強化，退火中期的軟化則為原先單一微結構，產生雙相結構而軟化，退火後期則是ρ相大量析出，而產生再析出強化的現象。

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