<strong>Hf</strong>和<strong>Ta</strong>对镍基粉末高温合金蠕变断裂特征和性能的影响

Hf和Ta对镍基粉末高温合金蠕变断裂特征和性能的影响

张浩鹏, 白佳铭, 李新宇, 李晓鲲, 贾建, 刘建涛, 张义文

Effect of Hf and Ta on Creep Rupture Characteristics and Properties of Powder Metallurgy Ni-Based Superalloys

ZHANG Haopeng, BAI Jiaming, LI Xinyu, LI Xiaokun, JIA Jian, LIU Jiantao, ZHANG Yiwen

表2 各蠕变条件下不同Hf和Ta含量合金的蠕变断裂时间和最小蠕变速率

Table 2 Creep rupture time (t_r) and minimum creep rates (

\dot{ε}

) of the alloys under various creep conditions

Creep condition	Alloy	t_r / h	$\dot{ε}$ / s^-1
650 ^oC, 970 MPa	0Hf + 0Ta	64	$6.0 \times 10^{- 8}$
	0.5Hf + 0Ta	108	$1.4 \times 10^{- 8}$
	0Hf + 2.4Ta	305	$4.5 \times 10^{- 9}$
	0.5Hf + 2.4Ta	475	$1.0 \times 10^{- 9}$
700 ^oC, 770 MPa	0Hf + 0Ta	112	$5.5 \times 10^{- 9}$
	0.5Hf + 0Ta	169	$3.4 \times 10^{- 9}$
	0Hf + 2.4Ta	454	$1.9 \times 10^{- 9}$
	0.5Hf + 2.4Ta	543	$1.7 \times 10^{- 9}$
750 ^oC, 580 MPa	0Hf + 0Ta	140	$3.4 \times 10^{- 8}$
	0.5Hf + 0Ta	184	$1.0 \times 10^{- 8}$
	0Hf + 2.4Ta	355	$6.9 \times 10^{- 9}$
	0.5Hf + 2.4Ta	370	$3.5 \times 10^{- 9}$