預(yù)孿晶AQ80鎂合金熱壓縮本構(gòu)方程及熱加工圖

預(yù)孿晶AQ80鎂合金熱壓縮本構(gòu)方程及熱加工圖Constitutive equation and processing map of hot deformation for pre-twin AQ80 magnesium alloy

采用 Gleeble-3500熱模擬試驗(yàn)機(jī)，對(duì)預(yù)孿晶AQ80鎂合金在變形溫度為250~400 ℃、應(yīng)變速率為1×10-3~ 5 s-1條件下進(jìn)行熱壓縮實(shí)驗(yàn)。預(yù)孿晶AQ80鎂合金本構(gòu)方程的建立通過Arrhenius雙曲正弦函數(shù)推導(dǎo)而來。基于動(dòng)態(tài)材料模型，建立在應(yīng)變量為0.1、0.3和0.5下的熱加工圖。結(jié)果表明：預(yù)孿晶AQ80鎂合金的流變應(yīng)力隨著變形溫度升高和應(yīng)變速率下降而減小，熱加工圖中耗散峰值(η=48%)區(qū)出現(xiàn)在低溫低應(yīng)變速率范圍(250~280 ℃, 1×10-3 s-1)。結(jié)合熱加工圖和其對(duì)應(yīng)區(qū)域的金相組織進(jìn)行分析得出：應(yīng)變量為0.5的失穩(wěn)區(qū)在溫度為250~400 ℃、應(yīng)變速率為0.1~5 s-1范圍內(nèi)；然而，加工安全區(qū)在溫度為300~400 ℃、應(yīng)變速率在1×10-3~1×10-2 s-1范圍內(nèi)，組織特征表現(xiàn)為動(dòng)態(tài)再結(jié)晶。

The hot compression tests of pre-twin AQ80 magnesium alloy were conducted at temperature of 250-400 ℃ and strain rates of 1×10-3 to 5 s-1 by using the Gleeble-3500 hot-simulator. The constitutive equation of pre-twin AQ80 magnesium alloy was constructed by Arrhenius hyperbolic sine function. According to dynamic materials model, the hot processing maps of pre-twin AQ80 magnesium alloy were established for strain of 0.1, 0.3 and 0.5. The results show that the flow stress of pre-twin AQ80 magnesium alloy decreases with the decrease of strain rate and the increase of temperature. The processing maps exhibit one peak η value (48%) region at temperature of 250-280 ℃ and the strain rate of 1×10-3 s-1. Combining with analysis of hot processing map and the corresponding microstructure at each domain, the instability regions were identified to be at the temperature range of 250-400 ℃ and strain rate of 0.1-5 s-1 for billets deformed to strains of 0.5, while the microstructures characteristic mainly show dynamic recrystallization at the temperature of 300-400 ℃ and strain rate of 1×10-3-1×10-2 s-1, which were indicated as safe regions.

全文下載：https://pan.baidu.com/s/1wU3nxVZuUSVJFdPKoBxakw?

作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，通項(xiàng)公司擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對(duì)當(dāng)前和未來的市場(chǎng)需求，通項(xiàng)公司致力于為客戶提供優(yōu)質(zhì)的金屬材料解決方案。

TXCO has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. TXCO develops the superior alloy material solutions for current and future challenges.

獲取更多我們供應(yīng)的產(chǎn)品和服務(wù)信息，請(qǐng)致電086-021-3113 6111或發(fā)電子郵件service@sinoav.com聯(lián)系我們，您也可以通過微信，微博，領(lǐng)英，臉書，推特和谷歌+與我們互動(dòng)。

For more information on the products and services that we supply, call us at 086-021-3113 6111 or email us at service@sinoav.com. You can also get in touch on social media, we are constantly active on Weixin, Weibo, LinkedIn, Facebook, Twitter and Google+.