(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國家重點實驗室，蘭州 730050；
2. 蘭州理工大學(xué) 材料科學(xué)與工程學(xué)院，蘭州 730050)
摘 要: 采用X射線衍射分析儀(XRD)、差示掃描量熱儀(DSC)、萬能力學(xué)試驗機、掃描電子顯微鏡(SEM)及電化學(xué)工作站等研究退火以及深冷循環(huán)處理對Zr基塊體非晶結(jié)構(gòu)和性能的影響。結(jié)果表明：經(jīng)玻璃轉(zhuǎn)變溫度Tg及以下溫度退火處理后的試樣呈非晶態(tài)。隨著退火時間的延長，合金試樣熱穩(wěn)定性減弱、耐腐蝕性逐漸增強、壓縮塑性呈現(xiàn)先增強后減弱趨勢，在500 K(0.6Tg)保溫30 min時塑性應(yīng)變εp達(dá)16.44%。退火態(tài)(0.6Tg，保溫30 min)合金試樣經(jīng)深冷循環(huán)處理后仍呈非晶態(tài)。隨著循環(huán)次數(shù)的增加，合金試樣熱穩(wěn)定性增強、耐腐蝕性逐漸增強、壓縮塑性逐漸優(yōu)化，當(dāng)循環(huán)90次時塑性應(yīng)變εp達(dá)19.05%。綜上所述可知，適當(dāng)?shù)耐嘶鹛幚砉に嚺c深冷循環(huán)處理可以有效地提升Zr基塊體非晶合金性能。
關(guān)鍵字: Zr基塊體非晶合金；退火處理；深冷循環(huán)處理；原子結(jié)構(gòu)；力學(xué)性能
（1. State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China）
Abstract:The effects of annealing and cryogenic thermal cycles on the structure and properties of Zr-based bulk amorphous alloys were studied by X-ray diffraction (XRD) and differential scanning calorimeter (DSC), universal mechanical testing machine, scanning electron microscope (SEM) and electrochemical workstation. The results show that the structures of samples after annealed at glass transition temperature (Tg) and below Tg are all amorphous. With the increase of annealing time, the thermal stability of the alloy decreases, the corrosion resistance gradually increases, and the mechanical properties increase first and then decrease. The plastic strain εp reaches 16.44% at 500 K (0.6Tg) for 30 min. The annealed alloy (0.6Tg, holding for 30 min) is still amorphous after cryogenic cycle treatment. With the increase of cycle times, the thermal stability, corrosion resistance and mechanical properties of the alloy samples are improved gradually. The plastic strain εp reaches 19.05% after 90 cycles. Generally speaking, proper annealing process and cryogenic cycle treatment conditions can be used as effective methods to improve the properties of the alloy.
Key words: Zr based bulk amorphous alloy; annealing treatment; cryogenic cycling treatment; atomic structure; mechanical property
